CN101625499A - Micro-wavelength converting optical device and autocorrecting method thereof - Google Patents
Micro-wavelength converting optical device and autocorrecting method thereof Download PDFInfo
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- CN101625499A CN101625499A CN200810127673A CN200810127673A CN101625499A CN 101625499 A CN101625499 A CN 101625499A CN 200810127673 A CN200810127673 A CN 200810127673A CN 200810127673 A CN200810127673 A CN 200810127673A CN 101625499 A CN101625499 A CN 101625499A
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Abstract
The invention provides a micro-wavelength converting optical device and an autocorrecting method thereof. The micro-wavelength converting optical device such as a laser module uses a wavelength converter to convert a wavelength lambda 1 of a laser into an input light with a different wavelength lambda 2 based on a multiple frequency principle, obtains a current I1 representing a laser power before the conversion and current I2 representing an output light power after the conversion through a photoelectric detector when the converting efficiency of the wavelength converter is changed or reduced because of an environment temperature change, and adjusts and controls a pouring current of a laser through an iterative logic circuit according to a ratio of I2/I1 between the two currents, to adjust and control the wavelength lambda 1 of the laser so as to dynamically correct and compensate, automatically lock the wavelength lambda 1 of the laser at an optimal converting the wavelength lambda 2 of the wavelength converter and reach and keep the wavelength converting efficiency of the a small photo-electric device in an optimal operation state.
Description
Technical field
The present invention relates to a kind of miniature wavelength Conversion electrooptical device and bearing calibration automatically thereof.
Background technology
Present common electrooptical device (Photo-electronic/Photonic Device), as laser module (lasermodule), its range of application is quite extensive, comprises: scientific research aspect such as material behavior are measured, science excitation source, space remote measurement and resource detection etc.; National defense industry aspect such as laser range finder, laser are followed the trail of scanning system, laser defensive weapon etc.; Industry and people's livelihood aspect such as material processed (as micro electronmechanical system MEMS processing, resistance decoration, chip mark), underwater photography and habitata, non-destructive detection, semi-conductor chip detection etc.; Medical application aspect such as ophtalmic treatments, skin treating, tooth treatment, dental operation etc.
One electrooptical device (laser module), general using wavelength shifter (wavelength conversiondevice, or title wavelength Conversion crystal), is that the light source (as laser) of λ 1 converts the light source that wavelength is λ 2 to the frequency multiplication principle with a known wavelength in the electrooptical device (as laser module), uses to adapt to different needs.Described electrooptical device (or laser module) generally is commonly referred to as wavelength Conversion electrooptical device (Wavelength ConversionPhotonic Device).The set wavelength shifter of one wavelength Conversion electrooptical device (or laser module) can be designed to different structures, but before each wavelength shifter will be changed wavelength be the laser of λ 1 to convert conversion back wavelength to be the Wavelength of Laser conversion efficiency (wavelength conversion efficiency from λ 1 to λ 2) of λ 2, all form one specific as the curved line relation as the para-curve with respect to the relation of Wavelength of Laser λ 1 before the conversion.That is to say, when before wavelength X 1 coupling before the conversion or (coincident with) a certain specific conversion that coincide during optical maser wavelength, promptly be called maximum Wavelength-converting (maximum conversion wavelength) λ c, its wavelength conversion efficiency (wavelength conversion efficiency) just can reach maximal value, just reach the optimal operation state of maximum wavelength conversion efficiency (maximum wavelength conversion efficiency), and mate or during identical (coincident with) its maximum Wavelength-converting λ c as Wavelength of Laser λ 1 before the conversion, as less than or greater than as described in maximum Wavelength-converting λ c, its wavelength conversion efficiency promptly reduces; Yet, the wavelength X 1 before the one laser conversion or the maximum Wavelength-converting λ c of a wavelength shifter are that the temperature change with its laser aid or wavelength shifter changes, and environment temperature can change the temperature of described laser aid and wavelength shifter, and one the wavelength X 1 and the maximum Wavelength-converting λ c of a wavelength shifter before the laser conversion be different with respect to the temperature change rate (changing rate of temperature per temperature) of each degree of temperature, just be same as the maximum Wavelength-converting λ c of a wavelength shifter as the wavelength X 1 of hypothesis before next the laser conversion of a certain specific environment temperature, then when environment temperature changes, wavelength X 1 before the above-mentioned laser conversion is just no longer identical with the maximum Wavelength-converting λ c of wavelength shifter, and promptly wavelength conversion efficiency also can reduce (degraded); Therefore, at a wavelength Conversion electrooptical device, wavelength X 1 before the laser conversion is kept with the maximum Wavelength-converting λ c identical (coincideing) of wavelength shifter so that described wavelength shifter is reached and maintained maximum wavelength conversion efficiency (maximum wavelength conversion efficiency) is necessary.
Traditional wavelength Conversion electrooptical device (Wavelength Conversion Photonic Device), as DPSS (diode pumped solid state, diode pumped solid state) laser instrument all has volume big (bulky) haply, need outside acousto-optic modulator (require external acoustic optical modulator), low conversion efficiency (low conversion efficiency), the shortcoming of not temperature compensated mechanism (no temperature compensationmechanism) and high-energy consume (large energy consumption); And at present in the application technology of wavelength Conversion electrooptical device, further comprise US 6,778,582, the paper Wavelength Matching and Tuning inGreen Laser Packaging using Second Harmonic Generation that issued of Pub.No.US2008/0002745A1 and Corning Incorporated (Corning Inc.), wherein:
US 6,778,582 disclose and have utilized vertical cavity surface emitting laser (VCSEL) and the folded folded more at last last catoptron of nonlinear crystal (nonlinear crystal) of going up, and said structure is placed on the cooling base (heatsink), its encapsulating structure adopts the technology of piling up of vertical direction, and its architecture principle is to utilize near infrared VCSEL, with wavelength is the light of 1064nm, through nonlinear crystal (frequency-doubling crystal) conversion generation wavelength is the green glow of 532nm, amplifies with the generation green glow through the end face resonance of outside catoptron and VCSEL again; Yet, this kind mode difficulty accomplishes to mate immediately optical maser wavelength and nonlinear crystal centre wavelength, because of capturing the light intensity of VCSEL and conversion back solid-state laser, so that can limit the serviceability temperature scope of the laser of this framework, and described framework and can't be by the auto-control mode so that its nonlinear crystal (frequency-doubling crystal) reach and continue to maintain maximum wavelength conversion efficiency (maximum wavelength conversion efficiency).
Pub.No.US 2008/0002745A1 mainly openly utilizes non-projection in zone to do the optical source wavelength compensation of conversion back, promptly utilize non-projection in zone to monitor the stability of output light (conversion back light source) power, its compensation framework utilization is through wavelength shifter (wavelength converter) light afterwards, utilize spectroscope that light is partly captured detecting device (detector) again, and the current value that utilizes detecting device to detect judges whether the centre wavelength of DBR (distributed Blatt reflective) laser and nonlinear crystal centre wavelength have coupling, when diminishing, current value that detecting device detected represents not coupling of the centre wavelength of DBR laser and nonlinear crystal centre wavelength, this moment, feedback circuit will start the centre wavelength that (utilizing non-projection in zone action) adjusted the current value of DBR laser phase section (phase section) and then adjusted DBR laser, to reach the stablizing effect of output light (conversion back light source) power, yet, its compensation framework just utilizes the current value of the light after detecting device (detector) is changed through wavelength shifter (wavelength converter) with acquisition and detection to judge whether the centre wavelength of DBR laser and nonlinear crystal centre wavelength have coupling, therefore described framework can only make output light (conversion back light source) power reach stable, and can't be by the auto-control mode so that its wavelength shifter (wavelength converter) reach and continue to maintain maximum wavelength conversion efficiency (maximum wavelength conversionefficiency).
The paper Wavelength Matching and Tuning inGreen Laser Packaging using Second Harmonic Generation of Corning Incorporated (Corning Inc.), utilizing near-infrared laser diode (DBR laser) to send wavelength is 1064nm laser, and utilize light-collecting lens that laser is injected in the nonlinear crystal (wavelength shifter), so that 1064nm laser converts the green glow that wavelength is 532nm to, its framework is at laser diode (DBR laser) and nonlinear crystal (wavelength shifter) below one temperature controller and temperature sensor to be set respectively; Yet, this framework can't be done the optimization coupling of laser diode (DBR laser) and nonlinear crystal (wavelength shifter) centre wavelength immediately, can only utilize the temperature of measuring gained to go to suppose the coupling of laser diode (DBR laser) and two centre wavelengths of nonlinear crystal (wavelength shifter), promptly adjust the temperature of laser diode (DBR laser) and nonlinear crystal (wavelength shifter), to allow other centre wavelength move, therefore can produce the situation of distortion, just the power of output light after the conversion will change with external temperature, thus its framework and can't be by the auto-control mode so that its nonlinear crystal (wavelength shifter) reach and continue to maintain maximum wavelength conversion efficiency (maximum wavelength conversion efficiency).
As from the foregoing, in the application technology of wavelength Conversion electrooptical device, the wavelength Conversion electrooptical device such as the US 6 that comprise traditional wavelength Conversion electrooptical device such as DPSS (diode pumped solid state) laser instrument and present new development, 778,582, the paper that Pub.No.US2008/0002745A1 and Corning Incorporated (Corning Inc.) are issued, the best transition wavelength (λ C) that all can't be automatically the optical maser wavelength (λ 1) before the conversion be locked in wavelength shifter is to reach and to continue to maintain maximum wavelength conversion efficiency (maximum wavelength conversionefficiency).And the present invention designs at the demand.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of miniature wavelength Conversion electrooptical device and automatically bearing calibration thereof, so that the wavelength conversion efficiency of micro photo electric device is reached and continued to maintain the optimal operation state.
Still a further object of the present invention is to provide a kind of miniature wavelength Conversion electrooptical device and bearing calibration automatically thereof, so that the wavelength conversion efficiency of micro photo electric device is reached and is continued to maintain the optimal operation state, and the expansion operating temperature range, to promote the service efficiency of micro photo electric device.
Another purpose of the present invention is to provide a kind of miniature wavelength Conversion electrooptical device and bearing calibration automatically thereof, with the temperature of may command wavelength shifter in use and be maintained fixed, and then the best transition wavelength X c that makes wavelength shifter is maintained fixed and does not change with the variation of environment temperature, automatically Wavelength of Laser λ 1 is locked and equals the best transition wavelength X c of wavelength shifter at any time, so that the wavelength conversion efficiency of micro photo electric device is reached and is continued to maintain the optimal operation state, and the expansion operating temperature range, to promote the service efficiency of micro photo electric device.
For achieving the above object, the invention provides a kind of miniature wavelength Conversion electrooptical device, it comprises one first photoelectric detector, a laser instrument, a wavelength shifter, a light-dividing device, one second photoelectric detector and at least one iterative logical circuit, wherein:
First photoelectric detector is located at the side place of described laser instrument, in order to receiving the laser that is sent sub-fraction known wavelength λ 1 by described laser instrument one side, and according to the power of this laser, light signal is converted to electric current I 1;
Laser instrument, send sub-fraction wavelength X 1 laser to inject described first photoelectric detector by the one side, send the laser of most of known wavelength λ 1 and focus on by its another side and be incident upon the plane of incidence of described wavelength shifter, and the injection current of modulating described laser instrument is to change the Wavelength of Laser that described laser instrument is sent;
Wavelength shifter, be located at the place, a side of described laser instrument, the plane of incidence by described wavelength shifter receives the laser of the wavelength X of being sent by described laser instrument one side 1, and produces the laser of different wave length λ 2 and outwards exported by the exit facet of described wavelength shifter with the conversion of frequency multiplication principle; Described wavelength shifter has a maximum wavelength conversion efficiency with respect to the Wavelength of Laser of incident, when the wavelength X 1 of the laser power of incident equaled the maximum Wavelength-converting λ c of described wavelength shifter, the maximum wavelength conversion efficiency was reached in the wavelength Conversion work of described wavelength shifter;
Light-dividing device, it is provided with a plane of incidence, and described light-dividing device is divided into most laser of outside output in order to the laser of the wavelength X 2 that will be exported by the exit facet of described wavelength shifter and is incident upon the sub-fraction laser of second photoelectric detector;
Second photoelectric detector in order to receiving the laser by the fraction known wavelength λ 2 that described light-dividing device transmitted, and according to the power of this laser, is converted to electric current I 2 with light signal;
The iterative logical circuit, according to the parameter that is provided to carry out the iterative logical computing;
Wherein, when the conversion efficiency of described wavelength shifter in use reduces because of variation of ambient temperature, ratio value I2/I1 between the measured electric current I 2 of the electric current I 1 that described first photoelectric detector is measured, described second photoelectric detector is used as parameter, by described iterative logical circuit to carry out the iterative logical computing, to regulate and control the injection current of described laser instrument, sent Wavelength of Laser λ 1 to regulate and control described laser instrument, automatically Wavelength of Laser λ 1 regulation and control and locking are equaled the maximum Wavelength-converting λ C of wavelength shifter.
The present invention also provides a kind of automatic bearing calibration of miniature wavelength Conversion electrooptical device, and it comprises following steps:
One wavelength Conversion electrooptical device is provided, and its described wavelength dress changes electrooptical device and comprises a laser instrument and a wavelength shifter at least; Described laser instrument is sent the laser of known wavelength λ 1 to inject the plane of incidence of described wavelength shifter by the one side; Described wavelength shifter receives the laser of the wavelength X of being sent by described laser instrument 1 by its plane of incidence, and produce the laser of different wave length λ 2 and outwards export with frequency multiplication principle conversion, the maximum Wavelength-converting λ c when wherein said wavelength shifter has a maximum wavelength conversion efficiency and and reaches maximum conversion efficiency with respect to the Wavelength of Laser of incident by its exit facet;
One first photoelectric detector and one second photoelectric detector are provided; Described first photoelectric detector is located at the another side place of described laser instrument, in order to receiving the laser that is sent sub-fraction known wavelength λ 1 by described laser instrument another side, and according to the power of this laser, light signal is converted to electric current I 1; Described second photoelectric detector is located at the exit facet place of described wavelength shifter, the laser of the sub-fraction known wavelength λ 2 of the laser that is converted to wavelength X 2 that sends in order to the exit facet that receives by described wavelength shifter, and, light signal is converted to electric current I 2 according to the power of this laser;
At least one iterative logical circuit is provided, according to the parameter that is provided to carry out the iterative logical computing;
Wherein, when the conversion efficiency of wavelength shifter in use reduces because of variation of ambient temperature, two electric current I of measuring respectively with described first photoelectric detector, described second photoelectric detector 1, the ratio value I2/I1 between the I2 are used as parameter, by described iterative logical circuit to carry out the iterative logical calculation function, change the injection current of laser instrument, sent Wavelength of Laser λ 1 to regulate and control described laser instrument, and Wavelength of Laser λ 1 locking is equaled the maximum Wavelength-converting λ c of wavelength shifter.
Compared with prior art, miniature wavelength Conversion electrooptical device provided by the invention and automatically bearing calibration thereof can make the wavelength conversion efficiency of micro photo electric device reach and continue to maintain the optimal operation state.
Description of drawings
Fig. 1 is the basic framework synoptic diagram of the miniature wavelength Conversion electrooptical device of the present invention.
Fig. 2 is the structural representation of miniature wavelength Conversion electrooptical device first embodiment of the present invention.
Fig. 3 is the partial structurtes synoptic diagram of first photoelectric detector among Fig. 2.
Fig. 4 is the partial structurtes synoptic diagram of second photoelectric detector among Fig. 2.
Fig. 5 is the structural representation of TO-can encapsulation (TO-can packaging) pattern of Fig. 2 first embodiment.
Fig. 6 is the encapsulating structure synoptic diagram of miniature wavelength Conversion electrooptical device second embodiment of the present invention.
Fig. 7 is the encapsulating structure synoptic diagram of miniature wavelength Conversion electrooptical device the 3rd embodiment of the present invention.
Fig. 8 is the encapsulating structure synoptic diagram of miniature wavelength Conversion electrooptical device the 4th embodiment of the present invention.
Fig. 9 is the encapsulating structure synoptic diagram of miniature wavelength Conversion electrooptical device the 5th embodiment of the present invention.
Figure 10 is the automatic bearing calibration function block schematic diagram of the miniature wavelength Conversion electrooptical device of the present invention.
Description of reference numerals: miniature wavelength Conversion electrooptical device-1,1a, 1b, 1c, 1d, 1e; First photoelectric detector-10; The plane of incidence-101; Electronics contact plate pad (electronic contact pad)-102,103,104; First photodetector chips-105; Substrate (substrate)-106; Receive aperture (receivingaperture)-107; Reflecting surface-108; Substrate-11; TO-can encapsulation-12; TO-can eyeglass (TO-canlens)-121; TO-can covers (TO-can cap)-122; TO-can bearing (TO-can header)-123; TO-can electrically connect portion (electronic connection of TO-can)-124; First outer sleeve (holder)-13; Second outer sleeve (holder)-14; Laser instrument-20; Side-201,203; Laser-202,204,205,206,207; Wavelength shifter-30; The plane of incidence-301; Exit facet-302; Light-dividing device-40; The plane of incidence-401; Second photoelectric detector-50; Second photodetector chips-501; Receive aperture (receiving aperture)-502; Electronics contact plate pad-503,504,505; Substrate (substrate)-506; The plane of incidence-507; Reflecting surface-508; Iterative logical (iteration logic) circuit-60; Eyeglass-70; Eyeglass-80; Outer cover eyeglass-81; Temperature sensor (temperature sensing device)-90; Temperature controller (temperature control device)-91.
Embodiment
Below in conjunction with accompanying drawing, above-mentionedly be described in more detail with other technical characterictic and advantage to inventing.
Shown in Fig. 1-4, it is respectively the basic framework synoptic diagram of miniature wavelength Conversion electrooptical device of the present invention, structural representation and the local structural representation of first embodiment.The described miniature wavelength Conversion electrooptical device of the embodiment of the invention (A Compact Wavelength Conversion Photonic Device withSelf-Calibration Function) 1, comprise: first photoelectric detector (photo detector, PD) 10, laser instrument 20, wavelength shifter 30, light-dividing device 40, second photoelectric detector (PD) 50 and at least one iterative logical (iteration logic) circuit 60.
Described first photoelectric detector (PD1) 10 is located at the place, a side of described laser instrument 20, in order to receive the sub-fraction known wavelength of being sent by described laser instrument 20 1 sides 201 is λ 1 laser 202, and light signal being converted to current signal I1 according to the luminous power (optical power) of described laser 202, just described current signal I1 can represent the luminous power of described laser 202; Described first photoelectric detector (PD) 10 can be the module (a module with several photonicdevices) that single-chip (single chip) or has at least two electrooptical devices, and for preventing that described laser 202 from reflecting back into described laser instrument 20, as shown in Figure 1 and Figure 2, the plane of incidence of described first photoelectric detector 10 (facet) 101 can be not orthogonal to the optical axis (opticalbeam axis) of laser 202.
Described laser instrument (laser) 20 can be semiconductor laser instrument (semiconductor laser) or diode pumped solid state (diode pumped solid state, DPSS) laser instrument, and can be the module that single-chip laser instrument (DFB, multi-section DBR laser) or has at least two electrooptical devices (send the light that wavelength is λ 0 and produce the light of wavelength X 1 through a solid crystals) as the semiconductor laser instrument; The sub-fraction known wavelength that described laser instrument 20 can be sent by one side 201 is the laser 202 of λ 1, and can to send most of known wavelength by its another side 203 be the laser 204 of λ 1 is incident upon described wavelength shifter 30 with focusing the plane of incidence 301; Again, can establish tool one temperature sensor (temperature sensing device) on the described laser instrument 20 to detect its temperature, and establish tool one temperature controller (temperature control device) as heating resistor (thermal resistor) or refrigerator (TE-cooler) controlling its temperature, and can enlarge operating temperature range; (injection current IL), or changes the laser wavelength lambda 1 of temperature to change described laser instrument 20 of described laser instrument further can to modulate the injection current of described laser instrument.
Described wavelength shifter 30 is located at 203 places, side in the face of described laser instrument 20, by the plane of incidence 301, reception is sent the laser 204 of wavelength X 1 by the side 203 of described laser instrument 20, and produces the laser 205 of wavelength X 2 and outwards exported by exit facet 302 with the conversion of frequency multiplication principle; Described wavelength shifter 30 can be stack material or waveguide (waveguide) material, to receive laser by the described plane of incidence 301; If described wavelength shifter 30 is provided with waveguide (waveguide) structure, the laser 204 that the plane of incidence 301 sizes of then its waveguide can be sent by described laser instrument 20 with easy reception greatly; And for preventing that described laser 204 from reflecting back into described laser instrument 20, the plane of incidence 301 of described wavelength shifter 30 can be not orthogonal to the optical axis (opticalbeam axis) of described laser 204; The described again plane of incidence 301 can plate one deck cooperate wavelength X 1 laser antireflection (anti-reflection, AR) plated film is so that it receives the laser 204 that is sent by described laser instrument 20 easily; Described exit facet 302 can plate one deck cooperate wavelength X 2 antireflection (anti-reflection, AR) plated film is so that the laser 205 of conversion back wavelength X 2 is sent by described exit facet 302 easily; Described again exit facet 302 can plate the height reflection plated film of one deck to wavelength X 1, is sent by described exit facet 302 with the laser 204 that prevents wavelength X 1.Described wavelength shifter 30 can be established tool one temperature sensor (temperature sensing device) to detect its temperature, and establish tool one temperature controller (temperature control device) as heating resistor (thermalresistor) or refrigerator (TE-cooler) controlling its temperature, and can enlarge operating temperature range; Described again wavelength shifter 30 has a maximum wavelength conversion efficiency (maximumwavelength conversion efficiency) with respect to the wavelength of the laser 204 of incident, just, when the wavelength X 1 of the laser 204 of incident can be regulated and control to the maximum Wavelength-converting that equals (coincideing) wavelength shifter 30 (maximum conversionwavelength) λ c, can make the conversion work of wavelength reach the maximum wavelength conversion efficiency; Can utilize the temperature that changes wavelength shifter 30 to change its maximum wavelength Wavelength-converting λ c again.
Described light-dividing device 40 will be in order to being divided into small one and large one two parts by wavelength X 2 laser 205 that the exit facet 302 of described wavelength shifter 30 is exported, outwards output is forming miniature wavelength Conversion electrooptical device 1 desired output laser for most of laser 206 wherein, and fraction laser 207 wherein is incident upon (input) second photoelectric detector 50.With Fig. 1 is the example explanation, the 90 degree outgoing vertically upward again of the plane of incidence 401 usefulness of described light-dividing device 40 so that described laser 205 is turned by horizontal direction incident, make the part reflecting face of described plane 401 as the laser 205 of wavelength X 2, can be reflected when making most of laser 206 of described laser 205 be incident on the described plane 401, have only fraction laser 207 can penetrate described plane 401 and received by described second photoelectric detector (PD) 50.The described plane of incidence 401 can be the partial reflection material that cooperates wavelength X 2, maybe can set up the partial reflection spectroscope of a cooperation wavelength X 2.
Described second photoelectric detector (PD) 50 is the laser 207 of λ 2 in order to receive the fraction known wavelength of being sent here by described light-dividing device 40, and according to the luminous power (optical power) of described laser 207, light signal is converted to current signal I2, just, described current signal I2 can represent the luminous power of described laser 207; Described again second photoelectric detector (PD) 50 can be the module (a module with several photonic devices) that single-chip (single chip) or has at least two electrooptical devices.
Described iterative logical (iteration logic) circuit 60 has the iterative logical calculation function, it can be according to the iterative logical calculation function of the data that provided to set, with miniature wavelength Conversion electrooptical device 1, it utilizes the injection current (injection current) of the calculation function of iterative logical with the described laser instrument 20 of auto-control, with synchronization modulation laser wavelength lambda 1.
Pass through said structure, when the conversion efficiency of described wavelength shifter 30 in use causes variation or reduction because of variation of ambient temperature, be that the wavelength X 1 of laser 204 of described wavelength shifter 30 is different with maximum Wavelength-converting λ C at that time and can't reach the maximum wavelength conversion efficiency time, can be with described first photoelectric detector 10, two measured electric current I 1 of described second photoelectric detector 50, ratio value between the I2 (I2/I1) is used as parameter, and by the iterative logical calculation function of described iterative logical (iteration logic) circuit 60 to set, injection current (injection current) with the described laser instrument 20 of auto-control, as: do computing behind the injection current of laser instrument 20 as described in increasing, if the wavelength conversion efficiency of gained reduces on the contrary, the injection current that just oppositely changes the described laser instrument 20 of reduction into is to promote wavelength conversion efficiency, so the injection current that the iterative logical computing can be by regulating and control described laser instrument 20 is to reach the maximum wavelength conversion efficiency, just, utilize iteration to change the method for injection current of described laser instrument 20 to regulate and control the wavelength (λ 1) of described laser instrument 20 laser that sent 204, automatically wavelength X 1 locking of described laser 204 being equaled the best (maximum) Wavelength-converting (λ C) of described wavelength shifter 30, so that the wavelength conversion efficiency of miniature wavelength Conversion electrooptical device 1 (conversion efficiency) is reached and continued to maintain the optimal operation state.
Described again miniature wavelength Conversion electrooptical device 1 has above-mentioned basic framework, promptly comprise first photoelectric detector 10, laser instrument 20, wavelength shifter 30, light-dividing device 40, second photoelectric detector (PD) 50 reaches iterative logical (iteration logic) circuit 60 basic building blocks such as grade at least, yet its assembling mode or encapsulation (packaging) mode is not restricted to this, can the integrated mode of chip (wafer) and cooperate the assembling of TO-can encapsulation (TO-can packaging) pattern to form as above-mentioned basic framework as shown in Figure 1, also generally optical element as sending optics submodule (transmit optical sub-assembly, abbreviation TOSA) sleeve (holder) mode commonly used is assembled formation, it can need or cost is considered and selected with volume production, is respectively described below with preferred embodiment:
First embodiment
Shown in Fig. 2-5, it is respectively the synoptic diagram of structure, the first photoelectric detector part, second photoelectric detector part and encapsulation (TO-can packaging) structure thereof of miniature wavelength Conversion electrooptical device first embodiment of the present invention.The described miniature wavelength Conversion electrooptical device 1a of present embodiment assembles formation in the integrated mode of chip (wafer), and it comprises: first photoelectric detector 10, laser instrument 20, wavelength shifter 30, light-dividing device 40, second photoelectric detector 50 reach in relevant Circuits System and are provided with an iterative logical (iteration logic) circuit 60 (Fig. 2 does not show) at least; Wherein, as shown in Figure 2, between described laser instrument 20 and described wavelength shifter 30, can establish an eyeglass 70, in order to will focus to described wavelength shifter 30 by the laser 204 that described laser instrument 20 sends; Described eyeglass 70 can be the lens systems of single eyeglass or at least two eyeglasses of a tool, its can be a spherical mirror, an aspheric mirror, a gradient type mirror (GRIN lens) but or the optical devices of other optically focused/focussed laser beams; And if laser beam 204 enters the degree of scattering of described wavelength shifter 30 when little, described eyeglass 70 is inessential.
The plane of incidence 101 of described first photoelectric detector 10 can be not orthogonal to the optical axis (opticalbeam axis) of laser 202; And be to simplify package handling, the structure of described first photoelectric detector 10 as shown in Figure 3, all electronics contact plate pads (electronic contact pad) 102,103,104 and first photodetector chips 105 all is seated on the plane of the supporting surface that is parallel to substrate (substrate) 106, with the combining of facilitating chip and substrate (die bonding) or connecting line (gold thread) the automated job that combines (wire bonding) with substrate.
Described substrate 106 can be by making the material of the low loss of wavelength X 0 (low loss), or establish tool and be looped around the hole slot of optical path periphery of laser 202 with the light loss of the reception aperture (receiving aperture) 107 that reduces laser 202 (photo detector chip) 105 from the described plane of incidence 101 to described first photodetector chips; And reflecting surface 108 reflexes to the laser 202 of incident on the reception aperture (receiving aperture) 107 of described first photodetector chips 105, for reaching this purpose, reflecting surface 108 can form make described laser 202 incident angle greater than total internal reflection (total internal reflection, TIR) critical angle (critical angle), or can plate the plated film of one deck on the described reflecting surface 108, or set up a catoptron to wavelength X 0 tool high reflectance.
Described wavelength shifter 30 is used to receive the laser 204 of the wavelength X of being sent by laser instrument 1 and the laser 205 that conversion produces wavelength X 2, and described wavelength shifter 30 can be a stack material or a waveguide (waveguide) material to receive luminous energy by its plane of incidence 301; If wavelength shifter 30 is provided with waveguiding structure, then the lateral dimension of its waveguide can be than the luminous energy that be sent by laser instrument with easy reception greatly; And for preventing that laser 205 from reflecting back into described laser instrument 20, the plane of incidence 301 of Fig. 2 medium wavelength converter 30 (please join prosperous Fig. 1) can be not orthogonal to the optical axis (optical beam axis) of described laser 204; The described plane of incidence 301 can plate one deck cooperate wavelength X 1 antireflection (anti-reflection, AR) plated film is so that receive the laser that is sent by described laser instrument 20 easily; Described exit facet 302 can plate one deck cooperate wavelength X 2 antireflection (anti-reflection, AR) plated film is so that the laser of conversion back wavelength X 2 is sent easily; Described exit facet 302 can be to be sent by described exit facet 302 with the laser that prevents wavelength X 1 the height reflection plated film of wavelength X 1.Described wavelength shifter 30 can be established tool temperature sensor (figure does not show) to detect its temperature, again wavelength shifter can establish tool temperature controller (figure do not show) as thermal resistor (thermal resistor) or refrigerator (TE-cooler) controlling its temperature, and can enlarge operating temperature range.Because described wavelength shifter 30 has a maximum wavelength conversion efficiency with respect to the wavelength of the laser 204 of incident, therefore can utilize the temperature that changes described wavelength shifter 30 to change described maximum Wavelength-converting.
As shown in Figure 2, the described plane of incidence 401 usefulness so that laser 205 is turned (90 degree as shown) to supporting surface perpendicular to substrate 11, the described plane of incidence 401 is used as the part reflecting face of the laser 205 of wavelength X 2, most of laser is incident on the described plane of incidence 401 and can be reflected, have only sub-fraction laser can penetrate the plane of incidence 401 and received by second photoelectric detector (PD, photo detector) 50; The described plane of incidence 401 can be the partial reflection material that cooperates wavelength X 2, maybe can set up the partial reflection spectroscope of a cooperation wavelength X 2.
The described second photoelectric detector (PD, photo detector) 50 send the fraction laser 207 of (promptly penetrating the described plane of incidence 401) in order to receive by the described plane of incidence 401, it can be the module (a module with several photonic devices) that single-chip (single chip) or has at least two electrooptical devices.And be instant packed operation, the structure of described second photoelectric detector 50 as shown in Figure 4, all electronics contact plate pads (electronic contact pad) 503,504,505 and second photodetector chips (photo detectorchip) 501 all is placed on the plane of the supporting surface that is parallel to substrate (substrate) 506, to make things convenient for the automated job of chip and the combination (wire bonding) that combines (die bonding) or lead (gold thread) of substrate; And the substrate among Fig. 4 (substrate) 506 can be by the material of wavelength X 2 low-loss is made, or establish the hole slot that tool is looped around the optical path periphery of laser 207, to reduce the light consume of laser 207 from the reception aperture (receiving aperture) 502 of the plane of incidence 507 to second photodetector chips 501.Reflecting surface 508 reflexes to the laser 207 of incident on the reception aperture (receiving aperture) 502 of described second photodetector chips 501 again, for reaching this purpose, described reflecting surface 508 can form make laser 207 incident angle greater than total internal reflection (totalinternal reflection, TIR) critical angle (critical angle), or can plate the plated film of one deck on the described reflecting surface 508, or set up a catoptron to wavelength X 0 tool high reflectance.
And substrate shown in Figure 2 (substrate) 11 is provided with the substrate (substrate) 402 and second photoelectric detector 50 of first photoelectric detector 10, laser instrument 20, eyeglass 70, wavelength shifter 30 in order to the location, and the electrical connection of laser instrument 20 also is provided, and laser instrument 20 and described wavelength shifter 30 thermal controls apparatus (thermal control device) that may be provided with; Described substrate (substrate) 11 can be established tool check key (alignment key) and/or etching hole (etched hole), so that support plate (substrate) 402 of described first photoelectric detector 10, described laser instrument 20, described eyeglass 70, described wavelength shifter 30 and described second photoelectric detector 50 are precisely located easily; Described substrate (substrate) 11 can be established tool temperature sensor (figure does not show) to detect its temperature, can establish again tool temperature controller (temperature control device) (figure do not show) as thermal resistor (thermalresistor) or refrigerator (TE-cooler) controlling its temperature, and can enlarge operating temperature range; Eyeglass among Fig. 2 80 is the selectivity device again, in order to optically focused/focusing outwards output by reflecting surface 401 laser light reflected 206.
As shown in Figure 5, the structural representation of the TO-can of its Fig. 2 first embodiment encapsulation (TO-can packaging) pattern.The one-piece construction body of first embodiment can be located in the TO-can encapsulation 12 as shown in Figure 2, comprise a TO-can eyeglass (TO-can lens) 121, one TO-can lid (TO-can cap) 122, one TO-can bearing (TO-can header) 123 and TO-can electrical connection section (electronic connection of TO-can) 124, can utilize described TO-can electrical connection section 124 to control and to detect each device on the above-mentioned first embodiment one-piece construction as shown in Figure 2.
Second embodiment
With reference to shown in Figure 6, the encapsulating structure synoptic diagram of miniature wavelength Conversion electrooptical device second embodiment of the present invention.Miniature wavelength Conversion electrooptical device 1b with general optical element as sending optics submodule (transmit optical sub-assembly, abbreviation TOSA) metal-coating tube (metal holder) mode commonly used is assembled formation, its basic framework comprises: first photoelectric detector 10, laser instrument 20 (can be a DBR laser instrument), wavelength shifter 30 (can be a PPLN (Periodically Poled Lithium Niobate) crystal), light-dividing device 40 (can be a spectroscope), second photoelectric detector 50 reaches in relevant Circuits System and is provided with an iterative logical (iteration logic) circuit 60 (not showing among Fig. 6) at least, and as shown in Figure 6, between described laser instrument 20 and described wavelength shifter 30, can establish an eyeglass 70, in order to will focus to described wavelength shifter 30 by the laser 204 that described laser instrument 20 sends, described eyeglass 70 can be the lens systems of single eyeglass or at least two eyeglasses of a tool, it can be a spherical mirror, one aspheric mirror, one gradient type mirror (GRINlens) but or the optical devices of other optically focused/focussed laser beams, if but laser 204 enters the degree of scattering of described wavelength shifter 30 when little, described eyeglass 70 is inessential.Present embodiment can be established an eyeglass 80 and a protection outer cover eyeglass 81 again, and described eyeglass 80 is the selectivity device, in order to optically focused/focusing outwards output by reflecting surface 401 laser light reflected 206.
And the framework of miniature wavelength Conversion electrooptical device 1b has the coaxial-type adjusting function, it utilizes metallic first outer sleeve (metal holder) 13, with location described first photoelectric detector 10 of assembling and described laser instrument 20 and/or eyeglass 70, and utilize metallic second outer sleeve (metal holder) 14 to assemble described wavelength shifter 30, light-dividing device 40 and second photoelectric detector 50 and/or eyeglass 80, protect with outer cover eyeglass 81 with the location; By adjusting described first outer sleeve (metal holder) 13 and described second outer sleeve (metalholder) 14, more described first outer sleeve 13 and described second outer sleeve, 14 positioning bondings are integral again so that aim at contraposition to an optimum position between the two.
The 3rd embodiment
With reference to shown in Figure 7, it is the encapsulating structure synoptic diagram of the 3rd embodiment of miniature wavelength Conversion electrooptical device of the present invention.The encapsulating structure of miniature wavelength Conversion electrooptical device 1c is similar to the miniature wavelength Conversion electrooptical device 1b of second embodiment, also has the coaxial-type adjusting function by adjusting first outer sleeve (metal holder), 13 and second outer sleeve (metal holder) 14; And present embodiment is established tool one temperature sensor (temperature sensing device) 90 respectively in addition to detect its temperature on described laser instrument 20 and described wavelength shifter 30, and a temperature controller (temperature control device) 91 as refrigerator (TE-cooler) are to control temperature, can enlarge the operating temperature range of present embodiment relatively, to promote the service efficiency of micro photo electric device.
The 4th embodiment
With reference to shown in Figure 8, it is the encapsulating structure synoptic diagram of the 4th embodiment of miniature wavelength Conversion electrooptical device of the present invention.The encapsulating structure of miniature wavelength Conversion electrooptical device 1d is similar to the miniature wavelength Conversion electrooptical device 1b of second embodiment, can have the coaxial-type adjusting function by adjusting first outer sleeve (metal holder), 13 and second outer sleeve (metal holder) 14; And different between the miniature wavelength Conversion electrooptical device 1b of the miniature wavelength Conversion electrooptical device 1d of present embodiment and second embodiment be in: second photoelectric detector 50 of the miniature wavelength Conversion electrooptical device 1d of present embodiment is assembled in the opposite side of laser 205 through light-dividing devices 40, and promptly fraction laser 207 penetrates described light-dividing device 40 and parallel with laser 205 approximately and be incident upon described second photoelectric detector 50; And in the encapsulating structure of the miniature wavelength Conversion electrooptical device 1b of second embodiment, the spectroscope structure function difference of described light-dividing device 40, make described second photoelectric detector 50 can be assembled in laser 205 and reflect the side that is an angle of 90 degrees through light-dividing device 40, promptly vertical with laser 205, just second photoelectric detector 50 of the miniature wavelength Conversion electrooptical device of second embodiment 1b is assembled in laser 205 90 degree vertical sides through light-dividing devices 40, and promptly fraction laser 207 is vertical with laser 205 and be incident upon described second photoelectric detector 50 via described light-dividing device 40 reflections.
The 5th embodiment
With reference to shown in Figure 9, it is the encapsulating structure synoptic diagram of miniature wavelength Conversion electrooptical device the 5th embodiment of the present invention.The encapsulating structure of the miniature wavelength Conversion electrooptical device 1e of present embodiment is similar to the miniature wavelength Conversion electrooptical device 1d of the 4th embodiment, also has the coaxial-type adjusting function by adjusting first outer sleeve (metal holder), 13 and second outer sleeve (metal holder) 14; And present embodiment is established tool one temperature sensor (temperature sensing device) 90 respectively in addition to detect its temperature on described laser instrument 20 and described wavelength shifter 30, and a temperature controller (temperature control device) 91 as refrigerator (TE-cooler) are to control temperature, can enlarge the operating temperature range of present embodiment relatively, to promote the service efficiency of micro photo electric device.
The miniature wavelength Conversion electrooptical device that has zero offset capability again with the present invention, maximum Wavelength-converting (maximumconversion wavelength) the λ c of laser wavelength lambda 1 necessary (coincident with) wavelength shifter that coincide before the conversion, so that converting the conversion work of laser wavelength lambda 2 to, laser wavelength lambda 1 reaches maximum wavelength conversion efficiency (maximum wavelength conversion wavelength), yet, the maximum Wavelength-converting of laser wavelength lambda 1 and wavelength shifter (maximum conversion wavelength) λ c will change along with the temperature change of laser instrument and wavelength shifter, just when wavelength X 1 before the conversion must reach or (coincident with) a certain specific conversion that coincide before during optical maser wavelength, promptly be called maximum Wavelength-converting (maximum conversion wavelength λ c), its wavelength conversion efficiency (wavelength conversionefficiency) just can reach maximal value, just reach the optimal operation state, and when wavelength X 1 before the conversion is coincide (coincident with) its maximum Wavelength-converting λ c, as less than or greater than as described in maximum Wavelength-converting λ c, its wavelength conversion efficiency promptly reduces; Yet, the maximum Wavelength-converting λ c of an optical maser wavelength of one lasing light emitter (conversion before) or a wavelength shifter is that the temperature change with its laser aid or wavelength shifter changes, and environment temperature will change the temperature of described laser aid and wavelength shifter, and the maximum Wavelength-converting λ c of an optical maser wavelength of a lasing light emitter (conversion before) and a wavelength shifter is different with respect to the temperature change rate (changingrate of temperature per temperature) of each degree of temperature, just be same as (identical as hypothesis in the optical maser wavelength (before the conversion) of a certain next lasing light emitter of specific environment temperature, coincident with) the maximum Wavelength-converting λ c of a wavelength shifter, then when environment temperature changes, the maximum Wavelength-converting λ c of above-mentioned optical maser wavelength (conversion before) and wavelength shifter is with regard to no longer identical (coincideing), and promptly wavelength conversion efficiency also reduces (degraded); Therefore, at a wavelength Conversion electrooptical device, when changing, environment temperature still make optical maser wavelength (before the conversion) keep identical (coincideing) to be necessary with the maximum Wavelength-converting λ c of wavelength shifter.
As shown in figure 10, it discloses a kind of optical maser wavelength (before the conversion) that makes and keeps the method for identical (coincideing) with the maximum Wavelength-converting λ c of wavelength shifter when environment temperature changes, wherein:
I1 is by first photoelectric detector, the 10 measured photocurrents of obtaining, the received luminous power of itself and first photoelectric detector 10 is proportional, the laser power 202 that itself and laser instrument 20 are sent by a side 201 is proportional, and also the power P 1 of the laser 204 that is sent by a side 203 with laser instrument 20 is proportional; The control methods that I1 provides iterative logical (iteration logic) circuit 60 are with the required data of the wavelength X 1 of control laser instrument 20; In addition, I1 can provide luminous power (the power of the laser) the required data of laser power control logic (laser power control logic) with control laser, be that auto light power control (is APC, Auto-Power control), an example is that P1 is remained unchanged when laser instrument 20 temperature changes; For example when laser instrument 20 temperature increase, P1 reduces and I1 reduces, then, laser power control logic (laser powercontrol logic) increases the injection current (injection current) of laser instrument 20, the luminous power of laser can be retracted original level.
I2 is by second photoelectric detector, the 50 measured photocurrents of obtaining, and the power of the laser 207 that itself and second photoelectric detector 50 are received is proportional, and the power of itself and wavelength X 2 laser 205 is proportional; Because the wavelength conversion efficiency of wavelength shifter 30 is decided by (λ 1-λ C), the wavelength conversion efficiency that can set wavelength shifter 30 is C (λ 1-λ C), be that C is the function of (λ 1-λ C), so I2 and P1*C (λ 1-λ C) are proportional, if I2 is divided by I1, can obtain a function I2/I1 and wavelength conversion efficiency is that C (λ 1-λ C) is proportional, like this, can derive automatic bearing calibration of the present invention.
And the above-mentioned zero offset capability of automatically wavelength X 1 of laser 204 being regulated and control at any time and being locked the best (maximum) Wavelength-converting λ C that equals wavelength shifter 30 can be described as peak power output locking (powermaximum locking) mechanism, and the miniature wavelength Conversion electrooptical device 1 that the present invention just has a zero offset capability can be reached effect of peak power output locking (power maximum locking) mechanism; Please be simultaneously with reference to shown in Figure 10, automatic bearing calibration of the present invention can comprise following steps:
One wavelength Conversion electrooptical device is provided; Described wavelength Conversion electrooptical device 1 comprises a laser instrument 20 and a wavelength shifter 30 at least, and wherein said laser instrument 20 can send the plane of incidence 301 of laser 204 to inject described wavelength shifter 30 that known wavelength is λ 1 by one side 203; Wherein said wavelength shifter 30 can be by its plane of incidence 301 to receive the laser power 204 by the wavelength X 1 that laser instrument was sent, and produce the laser 205 of wavelength X 2 and outwards export with frequency multiplication principle conversion, maximum Wavelength-converting (maximum conversion wavelength) the λ c when wherein said wavelength shifter 30 has a maximum wavelength conversion efficiency and to reach maximum conversion efficiency with respect to the wavelength of the laser 204 of incident by its exit facet 302;
One first photoelectric detector (PD is provided, photo detector) 10 and 1 second photoelectric detector (PD) 50, wherein said first photoelectric detector 10 is located at 201 places, a side of described laser instrument 20, in order to receive the sub-fraction known wavelength of being sent by described laser instrument 20 1 sides 201 is the laser 202 of λ 1, and according to the power of described laser 202 light signal is converted to electric current I 1; Wherein said second photoelectric detector 50 is located at exit facet 302 places of aforementioned wavelength shifter 30, in order to the wavelength that is converted to that receives that exit facet 302 by described wavelength shifter 30 sent is that the sub-fraction known wavelength of the laser 205 of λ 2 is the laser 207 of λ 2, and according to the power of described laser 207 light signal is converted to electric current I 2;
At least one iterative logical (iteration logic) circuit 60 is provided, and it can be according to the iterative logical calculation function of the data that provided to set;
Wherein, when the conversion efficiency of described wavelength shifter 30 in use reduces because of variation of ambient temperature, be that the wavelength X 1 of laser 204 of the described wavelength shifter 30 of incident is different with maximum Wavelength-converting λ c at that time and can't reach the maximum wavelength conversion efficiency time, can described first photoelectric detector 10, two measured electric current I 1 of described second photoelectric detector 50, ratio value I2/I1 between the I2 is used as parameter, by the iterative logical calculation function of described iterative logical circuit 60 to set, to utilize iteration to change the injection current of described laser instrument 20, the wavelength X 1 of the laser 204 that sends with the described laser instrument 20 of auto-control, and automatically wavelength X 1 locking of described laser 204 is equaled the maximum Wavelength-converting λ c of described wavelength shifter 30, so that the wavelength conversion efficiency of micro photo electric device 1 (conversion efficiency) is reached and is continued to maintain the optimal operation state.
More than explanation is just illustrative for invention, and nonrestrictive, those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited, can make many modifications, change; or equivalence, but all will fall within the scope of protection of the present invention.
Claims (14)
1, a kind of miniature wavelength Conversion electrooptical device is characterized in that, it comprises one first photoelectric detector, a laser instrument, a wavelength shifter, a light-dividing device, one second photoelectric detector and at least one iterative logical circuit, wherein:
First photoelectric detector is located at the side place of described laser instrument, in order to receiving the laser that is sent sub-fraction known wavelength λ 1 by described laser instrument one side, and according to the power of this laser, light signal is converted to electric current I 1;
Laser instrument, send sub-fraction wavelength X 1 laser to inject described first photoelectric detector by the one side, send the laser of most of known wavelength λ 1 and focus on by its another side and be incident upon the plane of incidence of described wavelength shifter, and the injection current of modulating described laser instrument is to change the Wavelength of Laser that described laser instrument is sent;
Wavelength shifter, be located at the place, a side of described laser instrument, the plane of incidence by described wavelength shifter receives the laser of the wavelength X of being sent by described laser instrument one side 1, and produces the laser of different wave length λ 2 and outwards exported by the exit facet of described wavelength shifter with the conversion of frequency multiplication principle; Described wavelength shifter has a maximum wavelength conversion efficiency with respect to the Wavelength of Laser of incident, when the wavelength X 1 of the laser power of incident equaled the maximum Wavelength-converting λ c of described wavelength shifter, the maximum wavelength conversion efficiency was reached in the wavelength Conversion work of described wavelength shifter;
Light-dividing device, it is provided with a plane of incidence, and described light-dividing device is divided into most laser of outside output in order to the laser of the wavelength X 2 that will be exported by the exit facet of described wavelength shifter and is incident upon the sub-fraction laser of second photoelectric detector;
Second photoelectric detector in order to receiving the laser by the fraction known wavelength λ 2 that described light-dividing device transmitted, and according to the power of this laser, is converted to electric current I 2 with light signal;
The iterative logical circuit, according to the parameter that is provided to carry out the iterative logical computing;
Wherein, when the conversion efficiency of described wavelength shifter in use reduces because of variation of ambient temperature, ratio value I2/I1 between the measured electric current I 2 of the electric current I 1 that described first photoelectric detector is measured, described second photoelectric detector is used as parameter, by described iterative logical circuit to carry out the iterative logical computing, to regulate and control the injection current of described laser instrument, sent Wavelength of Laser λ 1 to regulate and control described laser instrument, automatically Wavelength of Laser λ 1 regulation and control and locking are equaled the maximum Wavelength-converting λ C of wavelength shifter.
2, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, described first photoelectric detector is single-chip or the module with at least two electrooptical devices.
3, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, described laser instrument is semiconductor laser, diode pumped solid state laser device, single-chip laser instrument or has the module of at least two electrooptical devices.
4, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, described laser instrument is further established tool and detected the temperature sensor of its temperature and the temperature controller of its temperature of control.
5, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, the crystal of described wavelength shifter for being made of stack material.
6 miniature wavelength Conversion electrooptical devices as claimed in claim 1 is characterized in that described wavelength shifter is a waveguide material, to receive laser by its plane of incidence.
7, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, described wavelength shifter is further established tool and detected the temperature sensor of its temperature and the temperature controller of its temperature of control.
8, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, the plane of incidence of described light-dividing device is the partial reflection material that cooperates the laser wavelength lambda 2 of incident.
9, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, the plane of incidence of described light-dividing device is set up the partial reflection spectroscope of the laser wavelength lambda 2 of a cooperation incident.
10, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, described second photoelectric detector is single-chip or the module with at least two electrooptical devices.
11, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, a focusing/optically focused eyeglass is set between described laser instrument and described wavelength shifter.
12, as claim 1 or 11 described miniature wavelength Conversion electrooptical devices, it is characterized in that, it further comprises a substrate, described substrate be used for the location described first photoelectric detector, described laser instrument, described eyeglass, described wavelength shifter and described second photoelectric detector are set, and by described substrate so that the electrical connection of laser instrument to be provided.
13, miniature wavelength Conversion electrooptical device as claimed in claim 1 is characterized in that, described miniature wavelength Conversion electrooptical device adopts the TO-can encapsulation.
14, miniature wavelength Conversion electrooptical device as claimed in claim 1, it is characterized in that, it further comprises metallic first outer sleeve, with location described first photoelectric detector of assembling and laser instrument, and comprise metallic second outer sleeve, with location assembling described wavelength shifter, described light-dividing device and described second photoelectric detector, and coaxial the relocating of aligning contraposition adjustment is bonded to one between described first outer sleeve and described second outer sleeve.
15, a kind of automatic bearing calibration of miniature wavelength Conversion electrooptical device is characterized in that it comprises following steps:
One wavelength Conversion electrooptical device is provided, and its described wavelength dress changes electrooptical device and comprises a laser instrument and a wavelength shifter at least; Described laser instrument is sent the laser of known wavelength λ 1 to inject the plane of incidence of described wavelength shifter by the one side; Described wavelength shifter receives the laser of the wavelength X of being sent by described laser instrument 1 by its plane of incidence, and produce the laser of different wave length λ 2 and outwards export with frequency multiplication principle conversion, the maximum Wavelength-converting λ c when wherein said wavelength shifter has a maximum wavelength conversion efficiency and and reaches maximum conversion efficiency with respect to the Wavelength of Laser of incident by its exit facet;
One first photoelectric detector and one second photoelectric detector are provided; Described first photoelectric detector is located at the another side place of described laser instrument, in order to receiving the laser that is sent sub-fraction known wavelength λ 1 by described laser instrument another side, and according to the power of this laser, light signal is converted to electric current I 1; Described second photoelectric detector is located at the exit facet place of described wavelength shifter, the laser of the sub-fraction known wavelength λ 2 of the laser that is converted to wavelength X 2 that sends in order to the exit facet that receives by described wavelength shifter, and, light signal is converted to electric current I 2 according to the power of this laser;
At least one iterative logical circuit is provided, according to the parameter that is provided to carry out the iterative logical computing;
Wherein, when the conversion efficiency of wavelength shifter in use reduces because of variation of ambient temperature, two electric current I of measuring respectively with described first photoelectric detector, described second photoelectric detector 1, the ratio value I2/I1 between the I2 are used as parameter, by described iterative logical circuit to carry out the iterative logical calculation function, change the injection current of laser instrument, sent Wavelength of Laser λ 1 to regulate and control described laser instrument, and Wavelength of Laser λ 1 locking is equaled the maximum Wavelength-converting λ c of wavelength shifter.
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| CN2008101276738A CN101625499B (en) | 2008-07-07 | 2008-07-07 | Micro-wavelength converting optical device and autocorrecting method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684579A (en) * | 2013-12-04 | 2014-03-26 | 国网安徽省电力公司信息通信分公司 | Optical path protecting instrument with band switching function and control method of optical path protecting instrument |
| CN105319160A (en) * | 2015-10-30 | 2016-02-10 | 中国电子科技集团公司第四十八研究所 | Temperature compensation device for infrared transmitter for gas-liquid two-phase flow detection and infrared detection device |
| CN106785825A (en) * | 2016-12-20 | 2017-05-31 | 深圳市大京大科技有限公司 | A kind of diode pumped solid state laser |
| CN104061446B (en) * | 2013-03-21 | 2018-04-03 | 优志旺电机株式会社 | Laser light-source device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003001635A1 (en) * | 2001-06-22 | 2003-01-03 | Matsushita Electric Industrial Co., Ltd. | Light source apparatus and its control method |
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2008
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061446B (en) * | 2013-03-21 | 2018-04-03 | 优志旺电机株式会社 | Laser light-source device |
| CN103684579A (en) * | 2013-12-04 | 2014-03-26 | 国网安徽省电力公司信息通信分公司 | Optical path protecting instrument with band switching function and control method of optical path protecting instrument |
| CN105319160A (en) * | 2015-10-30 | 2016-02-10 | 中国电子科技集团公司第四十八研究所 | Temperature compensation device for infrared transmitter for gas-liquid two-phase flow detection and infrared detection device |
| CN106785825A (en) * | 2016-12-20 | 2017-05-31 | 深圳市大京大科技有限公司 | A kind of diode pumped solid state laser |
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| CN101625499B (en) | 2012-07-18 |
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