CN110233415A - Wavelength can multiple tuned distributed feedback optical fiber laser - Google Patents

Wavelength can multiple tuned distributed feedback optical fiber laser Download PDF

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Publication number
CN110233415A
CN110233415A CN201910455906.5A CN201910455906A CN110233415A CN 110233415 A CN110233415 A CN 110233415A CN 201910455906 A CN201910455906 A CN 201910455906A CN 110233415 A CN110233415 A CN 110233415A
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China
Prior art keywords
optical fiber
fiber laser
wavelength
distributed feedback
base construction
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CN201910455906.5A
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CN110233415B (en
Inventor
张发祥
祁海峰
姜劭栋
宋志强
王伟涛
倪家升
王昌
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Laser Institute of Shandong Academy of Science
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Laser Institute of Shandong Academy of Science
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02Constructional details
    • H01S3/04Arrangements for thermal management
    • H01S3/042Arrangements for thermal management for solid state lasers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06Construction or shape of active medium
    • H01S3/063Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067Fibre lasers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/1067Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using pressure or deformation

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

The present invention relates to a kind of laser, particularly disclosing a kind of wavelength can multiple tuned distributed feedback optical fiber laser.The distributed feedback optical fiber laser is the base construction of cambered surface including upper end, it is characterised in that: offer slot on the cambered surface axis of base construction, and be provided with inside groove in one end of base construction, the lower end of inside groove, which is connected by a hinge, vertical buckstay;Mechanical tuning structure and piezoelectric ceramics are sequentially installed in inside groove from inside to outside;Bottom of Base structure has successively sticked downwards temperature control chip and cooling fin, and base construction is placed in thermally insulating housing;Optical fiber laser is installed in the slot of base construction cambered surface.The present invention effectively expands wavelength tuning range, tunes especially with mechanical structure, can adjust wavelength with quick-speed large-scale;Thermal tuning, mechanical structure tuning are tuned with piezoelectric ceramics effectively to be combined, it can be achieved that the wavelength under big wavelength tuning range accurately controls.

Description

Wavelength can multiple tuned distributed feedback optical fiber laser
(1) technical field
The present invention relates to a kind of laser, in particular to a kind of wavelength can multiple tuned distributed feedback optical fiber laser.
(2) background technique
Distributed feedback optical fiber laser is emerging active optical fiber apparatus recent years, using doping light-sensitive optical fibre, by ultraviolet The technologies such as exposure, directly inscribe phase-shifted fiber grating in the doped region of optical fiber, carry out light feedback by phase-shifted grating and wavelength selects It selects, generates the laser of narrow linewidth, with single longitudinal mode output, line width, noise is low, coherence is strong, small in size, structure is simple, can The advantages that control property is strong and output spectrum characteristic is good, obtains extensively in fields such as fiber optic communication, Fibre Optical Sensor, national defence, medical treatment, rangings Using.
The output wavelength of distributed feedback optical fiber laser can cause to be distributed to temperature, strain sensitive, the variation of environment temperature The wave length shift of feedback fibre laser, the variation strained in same optical fiber can also cause the wavelength of distributed feedback optical fiber laser Drift.Heat-insulated or temperature control means are generally taken in the encapsulation of distributed feedback optical fiber laser, and ambient temperature variation is avoided to cause Wave length shift, and by sound insulation vibration isolation encapsulation, it avoids external sound, vibration from leading to fibre strain, improves wavelength stability.Dividing In terms of cloth feedback fibre laser wavelength tuning, according to the principle of its wavelength versus temperature or strain sensitive, wavelength tuning mode master It is divided into thermal tuning and mechanical tuning.Thermal tuning generally uses temperature control device, such as semiconductor chilling plate, real by changing temperature Now to the wavelength tuning of distributed feedback optical fiber laser, there is the relatively large advantage of wavelength regulation range, but adjustment speed is slow; Mechanical tuning generally passes through piezoelectric ceramics iso-stress regulating device, by changing fibre strain come adjusting wavelength, has and adjusts speed Fast advantage is spent, Single wavelength adjustable range is generally relatively narrow.
Xu Tuanwei etc. (200810224823.7) has invented a kind of Wavelength tunable that wavelength regulation is carried out by piezoelectric ceramics Humorous optical fiber laser reduces the complexity of optical fiber laser wavelength tuning, and by thermostatic control, overcomes environment temperature drift band The quasi-static drift for the optical fiber laser operation wavelength come.
Lu Xinghua etc. (201010273825.2) has invented a kind of single longitudinal mode distributed feedback optical fibre laser with tunable wavelength, It is tunable to realize that temperature controls by semiconductor chilling plate, can customer service variation of ambient temperature to the shadow of laser output wavelength It rings, stable laser output is realized under certain wavelength, and have certain wavelength tuning range.
Only influence of the ambient temperature variation to laser wavelength has been isolated by temperature control in above-mentioned technology, without It is effectively isolated external sound, the influence that vibration leads to wavelength change to laser.Moreover, the mode of above-mentioned piezoelectric ceramics tuning, Wavelength regulation range is relatively narrow, and the mode of thermal tuning, and adjustment speed is slower.
C.V. Poulsen etc. (201210414424.3) propose it is a kind of to the mechanical oscillation from environment have it is relatively low The optimal packaging body of susceptibility, can be used for the sound insulation vibration isolation encapsulation of distributed feedback optical fiber laser, and pass through piezoelectric ceramics and heat Expansion can be tuned the wavelength of optical fiber laser.There are still the problems that wide range of wavelengths adjustment speed is slower.
(3) summary of the invention
In order to compensate for the shortcomings of the prior art, the present invention provides a kind of signal sensitivity, wavelength tuning range is big, control is accurate Wavelength can multiple tuned distributed feedback optical fiber laser.
The present invention is achieved through the following technical solutions:
A kind of wavelength can multiple tuned distributed feedback optical fiber laser, be the strip base construction of cambered surface including upper end, It is characterized in that: offering slot on the cambered surface axis of base construction, and be provided with inside groove, the lower end of inside groove in one end of base construction Being connected by a hinge has vertical buckstay;Mechanical tuning structure and piezoelectric ceramics are sequentially installed in inside groove from inside to outside, is pressed Mechanical tuning structure is close in electroceramics one end, and the other end is close to buckstay;Bottom of Base structure has successively sticked downwards temperature control chip And cooling fin, and base construction is placed in thermally insulating housing;Optical fiber laser, and optical fiber are installed in the slot of base construction cambered surface The both ends of laser pass through epoxy glue A respectively and epoxy glue B is fixed on slot and buckstay.
Mechanical tuning structure of the present invention can generate thrust at both ends by adjustment effect, and piezoelectric ceramics drives in electric signal Lower promotion buckstay around hinge rotation, can also push buckstay around hinge to rotate under mechanical tuning structure thrust, and light Fibre laser then can generate strain variation under the modulation of buckstay;In addition the setting of temperature control chip is for controlling base construction Temperature.The invention proposes a kind of wavelength combined using thermal tuning, mechanical structure tuning, piezoelectric ceramics tuning multiple to adjust The tuning of humorous distributed feedback optical fiber laser, especially mechanical structure is effectively combined with piezoelectric ceramics tuning, passes through micro- stud knot Structure realizes on a large scale mechanical wavelength tuning immediately, and is further amplified by hinge, realizes the further of piezoelectric ceramics tuning Enhanced sensitivity realizes a wide range of high speed wavelength tuning.
More excellent technical solution of the invention are as follows:
The base construction is metal material, preferably, for annealing stainless steel material.
The trench bottom rounded corner, and surface is smooth, optical fiber laser sticking in slot closely and with sliding property.
The mechanical tuning structure includes that the first fit structure and second cooperation at both ends are connected to by fine adjustment screw Structure, by rotating fine adjustment screw, thus it is possible to vary the distance of the first fit structure and the second fit structure.
The fine adjustment screw includes centrally located adjustment gear and is located at the of adjustment gear two sides One screw thread and the second screw thread;First screw thread is left hand thread, and the second screw thread is right-handed thread, acts on adjustment gear, Ke Yizhuan Dynamic fine adjustment screw;Opposite, the threaded hole of corresponding fine adjustment screw is provided on the first fit structure and the second fit structure, It and is left hand thread.
The piezoelectric ceramics is made of the semicircular cap of strip piezoelectric ceramics main body and abutting buckstay, piezoelectric ceramics main body It is provided with signal wire for longitudinal polarization structure and in middle position, when applying voltage signal on signal wire, is generated along length side To deformation.
The temperature control chip is semiconductor chilling plate, and temperature control chip is mounted in thermally insulating housing and is affixed on pedestal by heat-conducting silicone grease The bottom of structure.
The thermally insulating housing includes thermally insulating housing lid and thermally insulating housing pedestal, and thermally insulating housing, which covers, is provided with corresponding adjusting tooth The adjusting lid of position is taken turns, thermally insulating housing chassis interior corresponds to two sides and is provided with boss, for fixing the tail optical fiber of optical fiber laser.
The optical fiber laser is distributed feedback optical fiber laser, distribution bragg feedback fibre laser, optical fiber cloth Glug grating or fiber Fabry-Pérot cavity optical fibre device equiwavelength's type optical fibre device.
The present invention effectively expands wavelength tuning range, tunes especially with mechanical structure, can be with quick-speed large-scale tune Whole wavelength;Thermal tuning, mechanical structure tuning effectively combine the wave, it can be achieved that under big wavelength tuning range with piezoelectric ceramics tuning Long accurate control;By temperature control and sensing structure is removed, is realized insensitive to temperature and vibration, acoustic signals;It is carried out by girder construction Lever amplification effectively improves the amplitude of piezoelectric ceramics.
(4) Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is overall structure diagram of the invention;
Fig. 2 is the schematic view of the front view of base construction of the present invention;
Fig. 3 is middle line diagrammatic cross-section shown in Fig. 2;
Fig. 4 is the structural schematic diagram of mechanical tuning structure of the present invention;
Fig. 5 is the structural schematic diagram of fine adjustment screw of the present invention;
Fig. 6 is the structural schematic diagram of piezoelectric ceramics of the present invention;
Fig. 7 is the structural schematic diagram of thermally insulating housing of the present invention.
In figure, 01 base construction, 011 hinge, 012 buckstay, 013 slot, 014 inside groove, 02 mechanical tuning structure, 021 One fit structure, 022 second fit structure, 023 fine adjustment screw, 0,231 first screw thread, 0,232 second screw thread, 0233 adjusting tooth Wheel, 03 piezoelectric ceramics, 031 piezoelectric ceramics main body, 032 semicircular cap, 033 signal wire, 04 temperature control chip, 05 cooling fin, 06 is heat-insulated outer Shell, 061 thermally insulating housing lid, 062 thermally insulating housing pedestal, 063 adjusting lid, 064 boss, 07 optical fiber laser, 071 epoxy glue A, 072 epoxy glue B.
(5) specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and referring to attached Figure, the present invention is described in more detail.
It, can multiple tuned distributed feedback optical fiber laser for a kind of wavelength provided by the invention, comprising: base with reference to Fig. 1 Holder structure 01, mechanical tuning structure 02, piezoelectric ceramics 03, temperature control chip 04, cooling fin 05, thermally insulating housing 06, optical fiber laser 07.
As shown in Figure 1, a kind of wavelength provided by the invention can multiple tuned distributed feedback optical fiber laser pedestal knot Structure 01 preferably, being formed by annealing stainless steel plate material by wire cutting or laser cutting process, or is added by ceramic material precision Work forms, and is string configuration, and upper end is cambered surface, is provided with inside groove 014 at one end, and 014 end of inside groove is connected with by hinge 011 One buckstay 012;There is slot 013 on cambered surface axis, as shown in figure 3, preferably, 013 bottom rounded corner of slot, and surface light It is sliding, to install optical fiber.
With reference to Fig. 1, Fig. 4, Fig. 5, mechanical tuning structure 02 is installed in inside groove 014, can be by adjustment effect at both ends Generate thrust;Mechanical tuning structure 02 includes the first fit structure 021, the second fit structure 022 and fine adjustment screw 023, and And by rotating fine adjustment screw 023, thus it is possible to vary the distance of the first fit structure 021 and the second fit structure 022;This hair A kind of specific embodiment of bright offer are as follows: fine adjustment screw 023 includes the first screw thread 0231, is left hand thread, the second screw thread 0232, it is right-handed thread, adjustment gear 0233, to rotate fine adjustment screw 023, and the first fit structure 021 and second Fit structure 022 has threaded hole with fine adjustment screw 023, and is all left hand thread, therefore, by the first fit structure 021, The mechanical tuning structure 02 that second fit structure 022 and fine adjustment screw 023 form passes through when rotating fine adjustment screw 023 The distance of the effect of two reverse threads, the first fit structure 021 and the second fit structure 022 changes.
With reference to Fig. 1, Fig. 6, piezoelectric ceramics 03 is installed in inside groove 014, and one end is adjacent to mechanical tuning structure 02, the other end It is adjacent to buckstay 012, the rotation of 012 around hinge 011 of buckstay is pushed under electric signal driving, in 02 thrust of mechanical tuning structure 012 around hinge 011 of buckstay can also be pushed to rotate under effect, therefore, can be driven by electric signal or rotating machinery tuning is tied Fine adjustment screw 023 in structure 02 carries out mechanical adjustment two ways, adjusts buckstay 012;It is provided by the invention a kind of specific Embodiment are as follows: piezoelectric ceramics 03 is made of strip piezoelectric ceramics main body 031 and semicircular cap 032, and piezoelectric ceramics main body 031 For longitudinal polarization, i.e., deformation along its length is generated when applying voltage signal on signal wire 033, to drive in electric signal Lower adjusting buckstay 012.
With reference to Fig. 1, temperature control chip 04 is affixed on the lower end of base construction 01, for controlling the temperature of base construction 01;Temperature control chip 04 is semiconductor chilling plate, and preferably, the lower end of base construction 01 is affixed on by heat-conducting silicone grease;As holonomic system, temperature control Piece 04 should also be integrated with temperature sensor and control circuit, and be affixed on the cooling fin 05 of 04 lower end of semiconductor chilling plate, temperature control Piece 04 can control the temperature stability of semiconductor chilling plate within 0.01 DEG C.
With reference to Fig. 1, Fig. 7, thermally insulating housing 06 includes thermally insulating housing lid 061 and thermally insulating housing pedestal 062, wherein heat-insulated outer Cap 061, to open the adjustment gear 0233 inside adjusting, has boss on the inside of thermally insulating housing pedestal 062 containing lid 063 is adjusted 064, to fix the tail optical fiber of optical fiber laser 07.
With reference to Fig. 1, Fig. 2, Fig. 7, optical fiber laser 07 is affixed in slot 013, and one end and slot 013 are fixed, preferably, using ring The mode and slot 013 of oxygen glue A071 bonding are fixed, and the other end and buckstay 012 are fixed, preferably, being bonded using epoxy glue B072 Mode and buckstay 012 it is fixed;Preferably, certain pretightning force should be contained in optical fiber laser 07, or mechanical by adjusting Tuning structure 02 applies certain pretightning force to optical fiber laser 07;Optical fiber laser 07 can produce under the modulation of buckstay 012 Raw strain variation;Optical fiber laser 07 can be distributed feedback optical fiber laser, distribution bragg feedback fibre laser, light Fine Bragg grating, fiber Fabry-Pérot cavity etc. have wave length type optical fibre device.
A kind of wavelength provided by the invention can multiple tuned distributed feedback optical fiber laser Tuning Principle it is as follows:
By adjusting mechanical tuning structure 02, change the pretightning force in optical fiber laser 07, thus quickly and widely adjustment light The central wavelength of fibre laser 07, adjusting sensitivity is about 1.2 micromicrons/microstrain, and adjustable range can achieve thousands of micromicrons;
By temperature control chip 04, the temperature of optical fiber laser 07 is adjusted, thus the large range of middle cardiac wave for changing optical fiber laser It is long, adjust sensitivity be about 10 micromicrons/degree Celsius, adjustable range can achieve several hundred micromicrons;
Piezoelectric ceramics 03 is driven by electric signal, changes the pretightning force in optical fiber laser 07, to quickly change optical-fiber laser The central wavelength of device, adjusting sensitivity is about 1.2 micromicrons/microstrain, and adjustable range can achieve several micromicrons, and adjusting frequency can To reach tens kHz.
The adjusting wavelength of optical fiber laser 07 is the superposition of above-mentioned three kinds of regulative modes, is organically combined by three kinds of modes, A wide range of, Rapid wavelength adjusting can be achieved and wavelength accurately controls.
A kind of wavelength provided by the invention can multiple tuned distributed feedback optical fiber laser to temperature, vibration, sound wave Go quick principle as follows:
By temperature control chip 04, the temperature stability of semiconductor chilling plate is controlled within 0.01 DEG C, and passes through thermally insulating housing lid The influence of 061 isolation ambient temperature variation is realized so that the temperature of optical fiber laser 07 be made to keep stablizing to ambient temperature Change insensitive;Optical fiber laser 07 is affixed on the curved surfaces in slot 013, and 01 material of base construction has centainly rigid Property, under extraneous small sound, effect of vibration, curved surfaces are not susceptible to deformation, the strain regime in optical fiber laser 07 It is not easy to receive interference, to have the function that acoustic shock and vibrate insensitive.
A kind of wavelength provided by the invention can the width that tunes to piezoelectric ceramics of multiple tuned distributed feedback optical fiber laser It is as follows to spend amplification principle:
If piezoelectric ceramics 03 is at a distance from the contact point of buckstay 012 to hinge 011b, optical fiber laser 07 and buckstay 012 Use 072 adhesive spots of epoxy glue to hinge 011 distance forl, then due to leverage, the amplitude of piezoelectric ceramics tuning is amplified Multiple isl/b, pass through adjustinglWithb, change distance parameter, thus it is possible to vary amplification factor.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this hair name, it is all Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement done should be included in protection of the invention Within the scope of.

Claims (10)

1. a kind of wavelength can multiple tuned distributed feedback optical fiber laser, including upper end be cambered surface strip base construction (01), it is characterised in that: slot (013) is offered on the cambered surface axis of base construction (01), and in one end of base construction (01) It is provided with inside groove (014), the lower end of inside groove (014) is connected with vertical buckstay (012) by hinge (011);Inside groove (014) It is inside sequentially installed with mechanical tuning structure (02) and piezoelectric ceramics (03) from inside to outside, mechanical adjust is close in piezoelectric ceramics (03) one end Humorous structure (02), the other end are close to buckstay (012);Base construction (01) bottom has successively sticked downwards temperature control chip (04) and has dissipated Backing (05), and base construction (01) is placed in thermally insulating housing (06);It is equipped in the slot (013) of base construction (01) cambered surface Optical fiber laser (07), and the both ends of optical fiber laser (07) pass through epoxy glue A(071 respectively) and epoxy glue B(072) be fixed on On slot (013) and buckstay (012).
2. wavelength according to claim 1 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: the base Holder structure (01) is metal material.
3. wavelength according to claim 1 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: the slot (013) bottom rounded corner, and surface is smooth, optical fiber laser (07) sticking in slot (013) closely and with sliding property.
4. wavelength according to claim 1 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: the machine Tool tuning structure (02) includes the first fit structure (021) and the second cooperation that both ends are connected to by fine adjustment screw (023) Structure (022).
5. wavelength according to claim 1 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: the pressure Electroceramics (03) is made of the semicircular cap (032) of strip piezoelectric ceramics main body (031) and abutting buckstay (012), piezoelectricity pottery Porcelain main body (031) is longitudinal polarization structure and middle position is provided with signal wire (033).
6. wavelength according to claim 1 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: the temperature Control wafer (04) is semiconductor chilling plate, and temperature control chip (04) is mounted in thermally insulating housing (06) and is affixed on pedestal knot by heat-conducting silicone grease The bottom of structure (01).
7. wavelength according to claim 1 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: the light Fibre laser (07) be distributed feedback optical fiber laser, distribution bragg feedback fibre laser, fiber bragg grating or Fiber Fabry-Pérot cavity optical fibre device.
8. wavelength according to claim 1 or 2 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: institute Base construction (01) is stated as annealing stainless steel material.
9. wavelength according to claim 4 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: described micro- Screw (023) is adjusted to include centrally located adjustment gear (0233) and be located at adjustment gear (0233) two sides First screw thread (0231) and the second screw thread (0232);First screw thread (0231) is left hand thread, and the second screw thread (0232) is dextrorotation Screw thread, it is opposite, corresponding fine adjustment screw (023) is provided on the first fit structure (021) and the second fit structure (022) Threaded hole, and be left hand thread.
10. wavelength according to claim 9 can multiple tuned distributed feedback optical fiber laser, it is characterised in that: described Thermally insulating housing (06) includes thermally insulating housing lid (061) and thermally insulating housing pedestal (062), is provided on thermally insulating housing lid (061) pair The adjusting lid (063) of adjustment gear (0233) position is answered, corresponding two sides are provided with boss inside thermally insulating housing pedestal (062) (064).
CN201910455906.5A 2019-05-29 2019-05-29 Distributed feedback fiber laser with multiple tunable wavelengths Active CN110233415B (en)

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