CN114172012A - Space-optical fiber hybrid resonator - Google Patents
Space-optical fiber hybrid resonator Download PDFInfo
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- CN114172012A CN114172012A CN202210124148.0A CN202210124148A CN114172012A CN 114172012 A CN114172012 A CN 114172012A CN 202210124148 A CN202210124148 A CN 202210124148A CN 114172012 A CN114172012 A CN 114172012A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0085—Modulating the output, i.e. the laser beam is modulated outside the laser cavity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling 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
- H01S3/108—Controlling 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 non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/1083—Controlling 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 non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering using parametric generation
Abstract
The invention provides a space-optical fiber hybrid resonator, which comprises: the optical fiber coupler comprises a pump laser, a dichroic mirror, a resonant cavity, a retarder, a first collimator, a first coupler, an optical fiber, a second coupler and a second collimator; the dichroic mirror outputs the first pulse laser output by the pump laser and the pulse laser output by the second collimator to the resonant cavity; the resonant cavity outputs second pulse laser with a second wavelength according to the input pulse laser; the delayer delays the second pulse laser and outputs the second pulse laser to the first collimator; the first collimator collimates the received pulse laser and outputs the pulse laser to the first coupler; the first coupler couples the received pulse laser into the optical fiber; the second coupler divides the pulse laser in the optical fiber into two paths of pulse laser; the second collimator collimates the received pulse laser and outputs the pulse laser to the dichroic mirror. The space-optical fiber-space oscillation circulation can be realized by applying the space-optical fiber hybrid resonator, and stable pulse sequence output is formed.
Description
Technical Field
The application relates to the technical field of optical parametric oscillators, in particular to a space-optical fiber hybrid resonator.
Background
Optical parametric oscillation is the main implementation means for generating mid-infrared laser at present. The technology utilizes a laser in a visible light wave band to pump a nonlinear crystal so as to realize optical parametric amplification; then, the parametrically amplified light forms resonance through an external resonant cavity to generate optical parametric oscillation, and laser output of middle infrared to far infrared wave bands is realized. Currently, there are two types of Optical Parametric Oscillators (OPOs) commonly used in the prior art: 1) the nonlinear waveguide integrated in the optical fiber coupler is utilized to realize the resonant cavity optical parametric oscillation of the all-fiber structure; 2) the light parametric oscillation in a linear or butterfly (annular) resonant cavity with a full free space structure is realized by utilizing a space block crystal.
The optical parametric amplification process in the nonlinear process is used for generating pulses of optical frequency, and the basic principle is as follows: pumping a nonlinear crystal by continuous and pulse laser of a visible light waveband, and carrying out parametric light amplification by a frequency down-conversion process to obtain two beams of light of near-infrared wavebands; then injecting the light beam into an optical fiber or a spatial resonant cavity, and continuously amplifying a parametric optical signal through a resonant process, so that the light beam of the near-infrared band generates an oscillation process and is used as stable laser output.
However, the problems in this technique are: the two optical parametric amplification methods and the resonant cavity cannot be compatible with each other, namely, the nonlinear waveguide can only be compatible with the optical fiber ring resonant cavity, and the block nonlinear crystal pumping mode can only be compatible with the spatial resonant cavity.
Disclosure of Invention
In view of the above, the present invention provides a space-fiber hybrid resonator, so that a space-fiber-space oscillation cycle can be realized to form a stable pulse train output.
The technical scheme of the invention is realized as follows:
a space-fiber hybrid resonator, comprising: the optical fiber coupler comprises a pump laser, a dichroic mirror, a resonant cavity, a retarder, a first collimator, a first coupler, an optical fiber, a second coupler and a second collimator;
the pump laser is used for outputting first pulse laser with a first wavelength once every a preset period of time;
the dichroic mirror is used for outputting the first pulse laser output by the pump laser and the pulse laser output by the second collimator to the resonant cavity;
a converter is arranged in the resonant cavity and used for outputting second pulse laser with a second wavelength according to the input pulse laser;
the delayer is used for delaying the second pulse laser and outputting the delayed pulse laser to the first collimator;
the first collimator is used for collimating the received pulse laser and outputting the collimated pulse laser to the first coupler;
the first coupler is used for coupling the received pulse laser into an optical fiber;
the second coupler is used for dividing the pulse laser in the optical fiber into two paths of pulse laser; wherein, the first path of pulse laser is directly output; the second path of pulse laser is output to the second collimator;
and the second collimator is used for collimating the received pulse laser and outputting the collimated pulse laser to the dichroic mirror.
Preferably, the resonant cavity includes: the device comprises a first cavity mirror, a second cavity mirror and a converter;
the first cavity mirror and the second cavity mirror are respectively arranged at two ends of the resonant cavity;
the converter is arranged between the first cavity mirror and the second cavity mirror.
Preferably, the converter is a periodically poled lithium niobate crystal.
Preferably, the delayer includes: a first mirror, a second mirror, and a third mirror;
the first reflecting mirror is used for reflecting the second pulse laser to the third reflecting mirror;
the third reflector is used for reflecting the second pulse laser to the second reflector;
the second reflector is used for outputting the second pulse laser to the first collimator.
Preferably, the first wavelength is 780 nm; the second wavelength is 1560 nanometers.
Preferably, the first coupler and the second coupler are 1 × 2 fiber couplers or 2 × 2 fiber couplers.
As can be seen from the above, in the space-fiber hybrid resonator of the present invention, since the pump laser, the dichroic mirror, the resonant cavity, the retarder, the two collimators and the two couplers are disposed in the space-fiber hybrid resonator, so that the first pulse laser with the first wavelength output by the pump laser can firstly complete the optical parametric amplification process in the free space resonant cavity to generate the pulse laser with the second wavelength, then coupled into an optical fiber loop through the collimator and the optical fiber coupler, and then re-enters the space through the optical fiber coupler and the collimator, a parametric oscillation resonant optical path is formed, space-optical fiber-space oscillation circulation is realized, thereby inducing a parametric oscillation process, forming a stable pulse sequence output, and outputting parametric light with a second wavelength from the loop through the fiber coupler.
Therefore, the space-optical fiber hybrid resonator can realize the tuning of the output light wavelength, has the characteristics of compatibility, tunable output wavelength and easy adjustment of cavity length, and can be used as a tunable mid-infrared fiber laser and a key component of a coherent Yixin quantum computing system.
Drawings
Fig. 1 is a schematic structural diagram of a space-fiber hybrid resonator in a first embodiment of the present invention.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and specific embodiments.
In the technical scheme of the invention, the space-optical fiber hybrid resonator is provided, so that space-optical fiber-space oscillation circulation can be realized, and stable pulse sequence output is formed.
Fig. 1 is a schematic structural diagram of a space-fiber hybrid resonator in a first embodiment of the present invention. As shown in fig. 1, in a specific embodiment of the present application, the space-fiber hybrid resonator includes: a pump laser 10, a dichroic mirror 11, a resonant cavity 12, a retarder 13, a first collimator 14, a first coupler 15, an optical fiber 16, a second coupler 17, and a second collimator 18;
the pump laser 10 is configured to output first pulse laser with a first wavelength once every preset period of time;
the dichroic mirror 11 is configured to output the first pulse laser output by the pump laser 10 and the pulse laser output by the second collimator 18 to the resonant cavity 12;
a converter is arranged in the resonant cavity 12 and used for outputting second pulse laser with a second wavelength according to the input pulse laser;
the delayer 13 is configured to delay the second pulse laser and output the delayed pulse laser to the first collimator 14;
the first collimator 14 is configured to collimate the received pulse laser and output the collimated pulse laser to the first coupler 15;
the first coupler 15 is used for coupling the received pulse laser into an optical fiber 16;
the second coupler 17 is used for dividing the pulse laser in the optical fiber 16 into two paths of pulse laser; wherein, the first path of pulse laser is directly output; the second path of pulse laser is output to the second collimator 18;
the second collimator 18 is configured to collimate the received pulse laser, and output the collimated pulse laser to the dichroic mirror 11.
In the above-described space-fiber hybrid resonator of the present invention, the first pulse laser light having the first wavelength output from the pump laser 10 may be incident into the resonant cavity 12 through the dichroic mirror 11 (the dichroic mirror 11 may transmit the pulse laser light having the first wavelength and reflect the pulse laser light having the second wavelength). The cavity 12 is in fact a free space cavity, the cavity 12 being further provided with a converter that can convert a first pulsed laser light having a first wavelength (e.g. 780 nm) into a second pulsed laser light having a second wavelength (e.g. 1560 nm). Thus, the first pulsed laser light may begin an optical parametric amplification process in the resonant cavity 12, thereby generating a parametric oscillation pulse having a second wavelength (i.e., a second pulsed laser light).
The second pulse laser is output from the resonant cavity 12 to the retarder 13, and is output to the first collimator 14 after being delayed by the retarder 13; the pulse laser light is collimated by the first collimator 14 and then coupled into the optical fiber 16 by the first coupler 15. After a predetermined distance has been transmitted in the optical fiber 16, the pulsed laser may be divided into two pulsed lasers by the second coupler 17: one path of pulse laser can be directly output, and the other path of pulse laser can be output to the second collimator 18, and after being collimated by the second collimator 18, the pulse laser is output to the dichroic mirror 11; the pulsed laser light, having the second wavelength, will be reflected by the dichroic mirror 11 into the resonant cavity 12, so that one cycle in the optical path can be completed.
In the technical scheme of the present invention, the retarder 13 may be adjusted to control the delay operation of the second pulse laser, so that when the parametric down-conversion laser pulse output by the pump laser for the nth time (n is a natural number) circulates in the optical path for one cycle and is output to the dichroic mirror 11, the parametric down-conversion laser pulse output by the pump laser for the (n + 1) th time is also output to the dichroic mirror 11, thereby forming a pulse sequence in the loop.
When the pulse sequence in the optical path meets the preset condition, the pulse sequence can be output from the optical path through the second coupler 17.
In the space-fiber hybrid resonator, the pulse laser with the first wavelength output by the pump laser can complete an optical parametric amplification process in the free space resonant cavity to generate the pulse laser with the second wavelength, then the pulse laser is coupled into the fiber loop through the collimator and the fiber coupler, and then the pulse laser reenters the space through the fiber coupler and the collimator to form a parametric oscillation resonant optical path, so that space-fiber-space oscillation circulation is realized, a parametric oscillation process is induced, stable pulse sequence output is formed, and the parametric light with the second wavelength can be output from the loop through the fiber coupler.
Therefore, the space-fiber hybrid resonator of the invention actually uses a method of hybridizing space and fiber to construct a resonant cavity, and is a hybrid fiber-free space resonant cavity loop, the optical parametric oscillation crystal is integrated in the free space loop, so that a degenerate/non-degenerate optical parametric oscillation process and the bypassing of optical pulses are in the hybrid loop, and thus, the tuning of the output light wavelength can be realized, and the resonator has the characteristics of compatibility, tunable output wavelength and easy cavity length adjustment, and can be used as a tunable mid-infrared fiber laser and a key component of a coherent yixin quantum computing system.
Further, as an example, in a specific embodiment of the present application, the resonant cavity 12 includes: a first cavity mirror 21, a second cavity mirror 22 and a converter 23;
the first cavity mirror 21 and the second cavity mirror 22 are respectively arranged at two ends of the resonant cavity 12;
the converter 23 is arranged between the first cavity mirror 21 and the second cavity mirror 22.
In addition, as an example, in a specific embodiment of the present application, the converter may be a Periodically Poled Lithium Niobate crystal (PPLN), or other suitable converter.
In addition, as an example, in a specific embodiment of the present application, the delayer 13 includes: a first mirror 31, a second mirror 32, and a third mirror 33;
the first reflecting mirror 31 is used for reflecting the second pulse laser to the third reflecting mirror 33;
the third reflector 33 is used for reflecting the second pulse laser to the second reflector 32;
the second mirror 32 is configured to output the second pulsed laser light to the first collimator 14.
The adjustment of the optical path length and thus the delay of the pulse laser can be achieved by adjusting the mutual distances among the first mirror 31, the second mirror 32, and the third mirror 33 in the retarder 13.
In addition, in the present invention, the optical path length can be adjusted by adjusting the length of the optical fiber 16.
Further, as an example, in a specific embodiment of the present application, the first wavelength may be 780 nanometers and the second wavelength may be 1560 nanometers.
Further, as an example, in a specific embodiment of the present application, the first coupler 15 may be a 1 × 2 fiber coupler (i.e., the fiber coupler has 1 input and 2 outputs), or may be a 2 × 2 fiber coupler (i.e., the fiber coupler has 2 inputs and 2 outputs).
When the first coupler 15 is a 2 x 2 fiber coupler, the remaining 1 input and 1 output can be used for the subsequent pulse injection process.
Likewise, as an example, in a specific embodiment of the present application, the second coupler 17 may be a 1 × 2 fiber coupler, and may also be a 2 × 2 fiber coupler.
In summary, in the technical solution of the present invention, because the pump laser, the dichroic mirror, the resonant cavity, the retarder, the two collimators and the two couplers are arranged in the space-fiber hybrid resonator, the first pulse laser output by the pump laser and having the first wavelength may first complete an optical parametric amplification process in the free space resonant cavity to generate a pulse laser having the second wavelength, and then the pulse laser may be coupled into the fiber loop through the collimators and the fiber couplers, and then re-enter the space through the fiber couplers and the collimators to form a parametric oscillation resonant optical path, so as to implement a space-fiber-space oscillation cycle, thereby inducing a parametric oscillation process, forming a stable pulse sequence output, and outputting parametric light having the second wavelength from the loop through the fiber couplers.
Therefore, the space-optical fiber hybrid resonator can realize the tuning of the output light wavelength, has the characteristics of compatibility, tunable output wavelength and easy adjustment of cavity length, and can be used as a tunable mid-infrared fiber laser and a key component of a coherent Yixin quantum computing system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A space-fiber hybrid resonator, comprising: the optical fiber coupler comprises a pump laser, a dichroic mirror, a resonant cavity, a retarder, a first collimator, a first coupler, an optical fiber, a second coupler and a second collimator;
the pump laser is used for outputting first pulse laser with a first wavelength once every a preset period of time;
the dichroic mirror is used for outputting the first pulse laser output by the pump laser and the pulse laser output by the second collimator to the resonant cavity;
a converter is arranged in the resonant cavity and used for outputting second pulse laser with a second wavelength according to the input pulse laser;
the delayer is used for delaying the second pulse laser and outputting the delayed pulse laser to the first collimator;
the first collimator is used for collimating the received pulse laser and outputting the collimated pulse laser to the first coupler;
the first coupler is used for coupling the received pulse laser into an optical fiber;
the second coupler is used for dividing the pulse laser in the optical fiber into two paths of pulse laser; wherein, the first path of pulse laser is directly output; the second path of pulse laser is output to the second collimator;
and the second collimator is used for collimating the received pulse laser and outputting the collimated pulse laser to the dichroic mirror.
2. The space-fiber hybrid resonator according to claim 1, wherein the resonant cavity comprises: the device comprises a first cavity mirror, a second cavity mirror and a converter;
the first cavity mirror and the second cavity mirror are respectively arranged at two ends of the resonant cavity;
the converter is arranged between the first cavity mirror and the second cavity mirror.
3. The space-fiber hybrid resonator according to claim 2, characterized in that:
the converter is a periodically poled lithium niobate crystal.
4. The space-fiber hybrid resonator according to claim 1, wherein the retarder comprises: a first mirror, a second mirror, and a third mirror;
the first reflecting mirror is used for reflecting the second pulse laser to the third reflecting mirror;
the third reflector is used for reflecting the second pulse laser to the second reflector;
the second reflector is used for outputting the second pulse laser to the first collimator.
5. The space-fiber hybrid resonator according to claim 1, characterized in that:
the first wavelength is 780 nanometers; the second wavelength is 1560 nanometers.
6. The space-fiber hybrid resonator according to claim 1, characterized in that:
the first coupler and the second coupler are 1 x 2 fiber couplers or 2 x 2 fiber couplers.
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| CN202210124148.0A CN114172012B (en) | 2022-02-10 | 2022-02-10 | Space-optical fiber hybrid resonator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5410559A (en) * | 1994-02-04 | 1995-04-25 | Spectra-Physics Lasers, Inc. | Diode pumped laser with strong thermal lens crystal |
| CN105591268A (en) * | 2016-02-29 | 2016-05-18 | 深圳英诺激光科技有限公司 | Large power fiber laser with inner cavity frequency doubling |
| CN107565360A (en) * | 2017-08-21 | 2018-01-09 | 华中科技大学 | A kind of kerr lens mode locking ti sapphire laser of diode-end-pumped |
| CN206947723U (en) * | 2017-06-29 | 2018-01-30 | 深圳瑞焱通光子技术有限公司 | A kind of fiber amplifier |
| CN108183387A (en) * | 2018-02-09 | 2018-06-19 | 上海交通大学 | A kind of optical parametric oscillator system for laser |
| CN109787081A (en) * | 2019-01-23 | 2019-05-21 | 广东朗研科技有限公司 | Mid-infrared ultra-short pulse laser light source |
-
2022
- 2022-02-10 CN CN202210124148.0A patent/CN114172012B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5410559A (en) * | 1994-02-04 | 1995-04-25 | Spectra-Physics Lasers, Inc. | Diode pumped laser with strong thermal lens crystal |
| CN105591268A (en) * | 2016-02-29 | 2016-05-18 | 深圳英诺激光科技有限公司 | Large power fiber laser with inner cavity frequency doubling |
| CN206947723U (en) * | 2017-06-29 | 2018-01-30 | 深圳瑞焱通光子技术有限公司 | A kind of fiber amplifier |
| CN107565360A (en) * | 2017-08-21 | 2018-01-09 | 华中科技大学 | A kind of kerr lens mode locking ti sapphire laser of diode-end-pumped |
| CN108183387A (en) * | 2018-02-09 | 2018-06-19 | 上海交通大学 | A kind of optical parametric oscillator system for laser |
| CN109787081A (en) * | 2019-01-23 | 2019-05-21 | 广东朗研科技有限公司 | Mid-infrared ultra-short pulse laser light source |
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