CN104035205A - High power pulse compression device based on helium-filled kagome optical fiber - Google Patents
High power pulse compression device based on helium-filled kagome optical fiber Download PDFInfo
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- CN104035205A CN104035205A CN201410267697.9A CN201410267697A CN104035205A CN 104035205 A CN104035205 A CN 104035205A CN 201410267697 A CN201410267697 A CN 201410267697A CN 104035205 A CN104035205 A CN 104035205A
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Abstract
Disclosed is a high power pulse compression device based on a helium-filled kagome optical fiber. The high power pulse compression device based on the helium-filled kagome optical fiber comprises a laser diode, an isolator, the helium-filled kagome optical fiber, two half wave plates, a polarization splitting prism and a single channel optical grating compressor. The laser diode produces ps magnitude high power pulse which is injected into the helium-filled kagome optical fiber through the isolator, the helium-filled kagome optical fiber has special optical properties, the loss threshold value of the helium-filled kagome optical fiber is high so that the high power pulse can be transmitted in the kagome optical fiber without damage to the kagome optical fiber, the high power pulse which is output by the kagome optical fiber enters a first half wave plate and then is reflected through the polarization splitting prism to enter a second half wave plate and finally injected into the single channel optical grating compressor to be compressed, and high power ps magnitude pulse compression can be achieved. During the experiment, the 1ps-width pulse is compressed to 480fs and below, the compressed pulse energy is 1 muJ, the average output power is 10.2W, and the peak power is 1.7MW.
Description
Technical field
The invention belongs to the communications field, it is a kind of kagome fiber device based on restriction fibre core pattern and cladding mode coupling, particularly relate to a kind of kagome optical fiber of having filled helium as transmission medium, the device that the high power pulse that realization is sent laser diode compresses.
Background technology
Ultrashort pulse is widely used in optical communication field, by the pulse compression of ps magnitude, to fs magnitude, is the focus that researchist pays close attention to always.T. the people such as S ü dmeyer is by using big mode field area solid light photonic crystal fiber to realize the compression of pulse under high power, the width sending from laser diode is that the pulse of 760fs is compressed to 24fs, the average power of compression afterpulse is 32W, and compression total efficiency is 50%.C. the people such as J. Saraceno is by using solid photon crystal optical fiber amplifier to realize the compression of high-power laser pulse, and pulse width may be compressed to 35fs, and pulse energy surpasses 3 μ J.These two kinds of compression sets are effective to the compression of the laser pulse of μ J level.Yet due to the self-focusing effect of standard molten silicon solid core fibres, peak power surpasses 4MW pulse just can not directly use this optical fiber compression set.So the compression of the pulse that will to realize the pulse energy that the best laser diode of performance is sent and be 30 μ J, peak power be 25MW just need to be found other compression set.Recently, the people such as S. H drich have been compressed to 35fs by a fiber amplifier apparatus by pulse width, and pulse energy is 380 μ J.Because the conduction mode power attenuation of capillary in this device is very large, so this technology can not be for the little optical fiber of mode field diameter.Therefore, this device is only applicable to pulse energy in hundreds of μ J and above situation.
In recent years, due to the appearance of kagome optical fiber, in this research direction of pulse compression, some new breakthroughs have been obtained.Kagome optical fiber has unique optical property, this optical fiber only has incomplete photon band gap, and non-intersect with air line, but light still can transmit in optical fiber, there is wide passband and lower loss simultaneously, can meet the application demand of long wave leaded light or broadband leaded light, can avoid Photonic Bandgap-photonic Crystal Fibers transport tape width, basic mode and interface mould to replace the defects such as light leakage, at high energy laser transmission field, there is potential using value.
Summary of the invention
Technical matters to be solved by this invention is that the compression set loss threshold value based on solid light photonic crystal fiber is low, the problems such as conduction mode stack power attenuation serious and pulse is large in optical fiber, a kind of new high power pulse compression set is provided, after high power pulse that laser diode sends can be transmitted in kagome optical fiber, inject single pass gratings compressor and compress, the ps magnitude pulse of finally sending from laser diode is compressed to fs magnitude.
The present invention has utilized that the loss threshold value of the kagome optical fiber of filling helium is high, transport tape is wide, loss is low, dispersion is little, with respect to some traditional compression devices (as: realizing the compression of pulse based on big mode field area solid light photonic crystal fiber under high power), the feature such as average power that the compression device based on kagome optical fiber has compression pulse is high, pulse quality good, compact conformation, volume are little, obtains researchist's concern.
Helium (Helium gas), compares with air and has lower nonlinear refractive index, can compensate the linear dispersion of waveguide simultaneously.The helium being filled in kagome optical fiber can also make the average power of laser diode output compared with high pulse, still can in kagome optical fiber, transmit and not damage optical fiber as cooling medium, has improved the loss threshold value of kagome optical fiber.
Technical scheme of the present invention:
A high power pulse compression set based on filling the kagome optical fiber of helium, comprises the kagome optical fiber of laser diode, isolator, filling helium, two half-wave plates, polarization splitting prism and single channel gratings compressors.The high energy pulse that described laser diode sends is by injecting the kagome optical fiber of filling helium, then successively by entering single channel gratings compressor after first half-wave plate, polarization splitting prism and second half-wave plate after isolator.
The kagome optical fiber of described filling helium is two rubber air chambers to be enclosed within respectively to two end faces of kagome optical fiber, an air chamber is used for extracting out the air in kagome optical fiber, in another air chamber, fill helium, extruding air chamber injects kagome optical fiber completely by helium.
Described half-wave plate is that the change of polarized direction of the high power pulse of exporting from kagome optical fiber is become to prepulse polarization direction quadrature with it.
Described polarization splitting prism is to be formed by a pair of high precision right-angle prism gummed, is coated with the silica membrane with polarization spectro effect on the inclined-plane of one of them prism, and its effect is that a branch of incident light is divided into the mutually perpendicular two-beam in the direction of propagation.
apparatus of the present invention principle of work is as described below:
The high-power laser pulse that laser diode sends injects kagome optical fiber by isolator, because kagome optical fiber has unique optical property, can suppress the coupling of higher order mode and fibre core pattern in fibre cladding, has therefore reduced the loss of pulse.The helium of filling in kagome optical fiber can compensate waveguide dispersion, and helium also can be used as cooling medium simultaneously, has therefore improved the loss threshold value of kagome optical fiber, makes kagome optical fiber can transmit high-octane pulse.
The light pulse of exporting in kagome optical fiber is injected polarization splitting prism after by first half-wave plate nonpolarized light pulse is become to linearly polarized light pulse, and wherein P polarized light passes through completely, and S polarized light becomes 45
0angle is reflected.Pulse is injected single channel gratings compressor through second half-wave plate, and after gratings compressor, the pulse of the high power ps magnitude that laser diode sends just can be compressed to fs magnitude.
advantage of the present invention and beneficial effect:
The present invention has used the kagome optical fiber of filling helium, and helium can be used as cooling medium in burst transmissions process, has improved the loss threshold value of kagome optical fiber.The pulse compression that in experiment, we are 1ps by width is below 480fs, and the pulse energy after compression is 1 μ J, and average output power is 10.2W, and peak power is 1.7MW.Such compression set has potential using value at optical communication field.
Accompanying drawing explanation
The structural representation of the high power pulse compression set of the kagome optical fiber of Fig. 1 based on filling helium;
In figure: 1. laser diode, 2. isolator, 3.kagome optical fiber, 4. half-wave plate, 5. polarization splitting prism, 6. single channel gratings compressor, 7. spectrometer.
Embodiment
For objects and advantages of the present invention are described better, below in conjunction with accompanying drawing and example, the invention will be further described.
embodiment1
As shown in Figure 1, the invention provides the high power pulse compression set based on kagome optical fiber, comprise laser diode 1, isolator 2, kagome optical fiber 3, two half-wave plates 4, polarization splitting prism 5, single channel gratings compressor 6.The pulse of the ps magnitude that laser diode 1 sends is injected into the kagome optical fiber 3 of having filled helium through isolator 2, the long 30cm of kagome optical fiber using in device, if use very long kagome optical fiber, will cause very strong nonlinear effect, greatly increase optical transmission loss; Mode field diameter is 25 μ m, if mode field diameter is excessive, can not realize single mode transport, and the power of transmission will greatly reduce.The kagome optical fiber 3 loss threshold values of filling helium are higher, therefore high power pulse can transmit and not damage optical fiber in kagome optical fiber 3, the pulse of kagome optical fiber 3 outputs enters into first half-wave plate 4, then by entering second half-wave plate 4 after polarization splitting prism 5 reflections, finally inject single pass gratings compressor 6, the pulse waveform after compressed finally shows on spectrometer 7.Kagome optical fiber 3 structures of filling helium are two rubber air chambers to be enclosed within respectively to two end faces of kagome optical fiber 3, and an air chamber is used for extracting out the air in kagome optical fiber 3, in another air chamber, fills helium, and extruding air chamber injects kagome optical fiber 3 by helium.Half-wave plate 4 is that the change of polarized direction of the high power pulse of output from kagome optical fiber 3 is become to prepulse polarization direction quadrature with it.Polarization splitting prism 5 is to be formed by a pair of high precision right-angle prism gummed, is coated with polarization spectro deielectric-coating on the inclined-plane of one of them prism, and its effect is that a branch of incident light is divided into the mutually perpendicular two-beam in the direction of propagation.
The high-power laser pulse that laser diode 1 sends injects kagome optical fiber 3 by isolator, and kagome optical fiber 3 has unique optical property, can suppress the coupling of higher order mode and fibre core pattern in fibre cladding, has therefore reduced the loss of pulse.The helium of filling in kagome optical fiber 3 can compensate waveguide dispersion, and helium also can be used as cooling medium simultaneously, has therefore improved the loss threshold value of kagome optical fiber 3, makes kagome optical fiber 3 can transmit high-octane pulse.
In kagome optical fiber 3, the light pulse of output becomes nonpolarized light pulse into linearly polarized light pulse by the rear injection polarization splitting prism 5 of first half-wave plate 4, and wherein P polarized light passes through completely, and S polarized light becomes 45
0angle is reflected.Pulse is injected single channel gratings compressor 6 through second half-wave plate 4, after gratings compressor 6, the pulse that width that laser diode 1 sends is 1ps is compressed to below 480fs, the pulse energy after compression is 1 μ J, average output power is 10.2W, and peak power is 1.7MW.
The loss threshold value of kagome optical fiber 3 is high, transport tape is wide, loss is low and dispersion is little, helium can be used for compensating the dispersion of waveguide on the one hand, on the one hand can also be as cooling medium, the loss threshold value that has made to fill the kagome optical fiber 3 of helium further improves, can transmit high-power pulse, finally realize the compression of high power pulse.
Claims (5)
1. the high power pulse compression set based on filling the kagome optical fiber of helium, comprises the kagome optical fiber of laser diode, isolator, filling helium, two half-wave plates, polarization splitting prism, single pass gratings compressor; The high energy pulse that described laser diode sends is by injecting the kagome optical fiber of filling helium, then successively through entering single channel gratings compressor after first half-wave plate, polarization splitting prism and second half-wave plate after isolator.
2. device according to claim 1, the kagome optical fiber that it is characterized in that described filling helium is two rubber air chambers to be enclosed within respectively to two end faces of kagome optical fiber, an air chamber is used for extracting out the air in kagome optical fiber, in another air chamber, fill helium, extruding air chamber injects kagome optical fiber by helium.
3. device according to claim 1 and 2, is characterized in that the long 30cm of kagome optical fiber of described filling helium; Mode field diameter is 25 μ m.
4. install according to claim 1, it is characterized in that first described half-wave plate is that the change of polarized direction of the high power pulse of exporting is become to prepulse polarization direction quadrature with it from kagome optical fiber; Second described half-wave plate is that the change of polarized direction that makes transmission cross the pulse of polarization splitting prism becomes prepulse polarization direction quadrature with it by after polarization splitting prism reflection.
5. device according to claim 1, it is characterized in that described polarization splitting prism is to be formed by a pair of high precision right-angle prism gummed, on the inclined-plane of one of them prism, be coated with polarization spectro deielectric-coating, its effect is that a branch of incident light is divided into the mutually perpendicular two-beam in the direction of propagation.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730620A (en) * | 2015-02-06 | 2015-06-24 | 烽火通信科技股份有限公司 | Low-loss hollow band gap pohotonic crystal fiber |
| KR20180006921A (en) * | 2015-05-14 | 2018-01-19 | 코히어런트, 인크. | Transmission of Polarized Laser Radiation with Cavity Fiber |
| CN104730620B (en) * | 2015-02-06 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of hollow band gap photonic crystal fiber of low-loss |
| CN109407354A (en) * | 2018-11-26 | 2019-03-01 | 杭州奕力科技有限公司 | A kind of tunable pulse broadening device of transmission-type monochromatic light grid multi-pass |
| CN114754800A (en) * | 2022-06-15 | 2022-07-15 | 中国船舶重工集团公司第七0七研究所 | Method and system for assembling hollow microstructure fiber optic gyroscope light path |
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| US20070041083A1 (en) * | 2005-07-29 | 2007-02-22 | Aculight Corporation | Fiber- or rod-based optical source featuring a large-core, rare-earth-doped photonic-crystal device for generation of high-power pulsed radiation and method |
| WO2009044100A1 (en) * | 2007-10-03 | 2009-04-09 | University Of Bath | Hollow-core photonic crystal fibre |
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2014
- 2014-06-17 CN CN201410267697.9A patent/CN104035205B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070041083A1 (en) * | 2005-07-29 | 2007-02-22 | Aculight Corporation | Fiber- or rod-based optical source featuring a large-core, rare-earth-doped photonic-crystal device for generation of high-power pulsed radiation and method |
| WO2009044100A1 (en) * | 2007-10-03 | 2009-04-09 | University Of Bath | Hollow-core photonic crystal fibre |
| CN101836143A (en) * | 2007-10-03 | 2010-09-15 | 巴斯大学 | Hollow-core photonic crystal fibre |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730620A (en) * | 2015-02-06 | 2015-06-24 | 烽火通信科技股份有限公司 | Low-loss hollow band gap pohotonic crystal fiber |
| CN104730620B (en) * | 2015-02-06 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of hollow band gap photonic crystal fiber of low-loss |
| KR20180006921A (en) * | 2015-05-14 | 2018-01-19 | 코히어런트, 인크. | Transmission of Polarized Laser Radiation with Cavity Fiber |
| CN107636503A (en) * | 2015-05-14 | 2018-01-26 | 相干公司 | Polarised laser emission is transmitted using hollow-core fiber |
| KR102669900B1 (en) * | 2015-05-14 | 2024-05-29 | 코히어런트, 인크. | Transmission of polarized laser radiation using hollow fibers |
| CN109407354A (en) * | 2018-11-26 | 2019-03-01 | 杭州奕力科技有限公司 | A kind of tunable pulse broadening device of transmission-type monochromatic light grid multi-pass |
| CN114754800A (en) * | 2022-06-15 | 2022-07-15 | 中国船舶重工集团公司第七0七研究所 | Method and system for assembling hollow microstructure fiber optic gyroscope light path |
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| CN104035205B (en) | 2016-09-14 |
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