CN202888605U - Rapid frequency sweeping laser light source of hyper-spectral resolution broadband - Google Patents
Rapid frequency sweeping laser light source of hyper-spectral resolution broadband Download PDFInfo
- Publication number
- CN202888605U CN202888605U CN 201220618205 CN201220618205U CN202888605U CN 202888605 U CN202888605 U CN 202888605U CN 201220618205 CN201220618205 CN 201220618205 CN 201220618205 U CN201220618205 U CN 201220618205U CN 202888605 U CN202888605 U CN 202888605U
- Authority
- CN
- China
- Prior art keywords
- tuned filter
- fiber coupler
- grating
- circulator
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Lasers (AREA)
Abstract
The utility model discloses a rapid frequency sweeping laser light source of a hyper-spectral resolution broadband. A first semiconductor optical amplifier and a second semiconductor optical amplifier are connected to one end of each of a first 50%-to-50% optical fiber coupler and a second 50%-to-50% optical fiber coupler in parallel; the other end of the first 50%-to-50% optical fiber coupler is connected with a first polarization controller; the first polarization controller is connected to the input end of a fabry-perot tuned filter; a waveform driver is connected to the fabry-perot tuned filter; the output end of the fabry-perot tuned filter is connected with a first port of a circulator; a third port of the circulator is connected to a second polarization controller, and then connected to a 40%-to-60% optical fiber coupler; one path of the 40%-to-60% optical fiber coupler is output through a 60% port; another path enters an annular laser oscillating chamber; the waveform driver is connected to a dual-grafting rotary polygon mirror tuned filter through a synchronizing gear, and a middle port of the circulator is connected to the dual-grafting rotary polygon mirror tuned filter.
Description
Technical field
The utility model relates to the frequency sweep Optical Coherence Tomography Imaging Technology, especially relates to a kind of high spectral resolution broadband rapid frequency-sweeping laser source.
Background technology
Optical coherent chromatographic imaging (Optical Coherence Tomography, be called for short OCT) be a kind ofly to obtain the structural images that micron dimension is differentiated by amplitude and the phase place of measuring rear orientation light, can be non-invasively, with no damage internal structure and the physiological function of biological tissue are carried out three-dimensional imaging.Frequency sweep OCT is the OCT technology of new generation of time domain OCT and spectral coverage OCT of continuing, and has obtained all imaging depth scope internal informations in a frequency sweep cycle.Frequency sweep OCT achieves real time imagery in the raising of speed, signal to noise ratio and sensitivity, is applied at the body biomedical diagnostic.
There are mutual trade-off problem in the frequency-scan speed of swept light source, frequency sweep bandwidth, spectral resolution.The Bouma group of Harvard University, developed the frequency-sweeping laser source based on the tuned filter of grating and polygonal rotating mirror, light arrives first grating and mates the face width degree of polygonal mirror and the scope of scanning angle by the size that telescopic system changes hot spot and convergent angle, realizes unidirectional, wavelength linear scanning.The Nezam of California Institute of Technology has proposed not have the tuned filter of telescopic system grating Littrow structure and polygonal rotating mirror, and light arrives first polygonal rotating mirror and directly reflexes to the auto-collimation frequency selecting by grating again.The people such as Canadian Leung have proposed the Li Teman structure of grating and the tuned filter of polygonal rotating mirror, and they have added a plane mirror.The human prisms such as ChanghoChong of Japan make up to carry out light and expand and shine the auto-collimation grating again.Distortion in any case still can't break through sweep speed, frequency sweep bandwidth, spectrally resolved trade-off problem.The Fujimoto groups of america's MIT etc. adopt optical fiber Fabry Perot tuned filter (fiber Fabry-Perot tunable filter, FFP-TF) to develop frequency-sweeping laser source.The Free Spectral Range of this tuned filter and spectral resolution (instantaneous live width) condition each other.The sweep velocity of frequency-sweeping laser source also will be subject to tuned speed and endovenous laser settling time of filter.The people such as the ding of Zhejiang University propose combined tuned filter and solve this contradiction, the FFP-TF cascade of adopting acousto-optic tunable filter (AOTF) and being operated under the disresonance frequence forms, FFP-TF uses under the disresonance frequence of higher frequency drives, it is very narrow that Free Spectral Range becomes, but FFP-TF is bilateral scanning, so cause duty ratio to descend.
In sum, how to break through the contradiction of sweep speed, frequency sweep bandwidth, spectral resolution, obtain the broadband, the high spectral resolution rapid frequency-sweeping laser source is large technological difficulties.
Summary of the invention
The purpose of this utility model is to provide a kind of high spectral resolution broadband rapid frequency-sweeping laser source, adopt two semiconductor optical amplifier (SOA) spread bandwidths in parallel, by coarse adjustment filter and tweak filter in conjunction with the mutual trade-off problem that solves sweep speed, frequency sweep broadband and spectral resolution.
The technical solution of the utility model is:
A kind of high spectral resolution broadband rapid frequency-sweeping laser source, by the first semiconductor optical amplifier, the second semiconductor optical amplifier, a 50%:50% fiber coupler, the 2nd 50%:50% fiber coupler, the first Polarization Controller, the second Polarization Controller, Fabry Perot tuned filter, drive waveform device, synchronizer, double grating polygonal rotating mirror tuned filter, the loop laser vibration chamber that circulator and 40%:60% fiber coupler form
The first semiconductor optical amplifier and the second semiconductor optical amplifier are connected in parallel on an end of a 50%:50% fiber coupler and the 2nd 50%:50% fiber coupler, the one 50%:50% fiber coupler other end connects the first Polarization Controller, this first Polarization Controller connects the input of Fabry Perot tuned filter, the drive waveform device connects the Fabry Perot tuned filter, the output of this Fabry Perot tuned filter connects the first port of circulator, the 3rd port of this circulator is connected to the second Polarization Controller, connect again the 40%:60% fiber coupler, this 40%:60% fiber coupler one tunnel is exported through 60% port, another road enters described loop laser vibration chamber
The drive waveform device is connected to double grating polygonal rotating mirror tuned filter by synchronizer, and the Centronics port of described circulator connects double grating polygonal rotating mirror tuned filter.
Described double grating polygonal rotating mirror tuned filter comprises fiber optic collimator mirror, polygonal mirror, electric machine controller, expansion grating and auto-collimation grating, electric machine controller drives polygonal mirror, collimated light goes out by the fiber optic collimator mirror, reflex to via polygonal mirror and to expand grating, expanded by this again and be diffracted into auto-collimation grating gating different color light behind the grating and reflect by former road, enter loop laser vibration chamber from Centronics port to the three ports of described circulator.
The beneficial effects of the utility model are:
The use of semiconductor optical amplifier (SOA) in parallel so that two semiconductor amplifiers (SOA) spontaneous emission light spectral limit expand each other, can remedy the band-limited restriction of single semiconductor amplifier (SOA), can not get the sweeping laser output of bandwidth so that tuned filter is unlikely to be subject to the restriction of spontaneous emission light spectral limit.
2. Fabry Perot tuned filter (FFP-TF) can overcome the problem that duty ratio that bilateral scanning brings descends as the coarse adjustment filter.
3. double grating polygonal rotating mirror tuned filter can be realized superfine tuningly, realizes high spectral resolution as tweak filter.
4. use the Fabry Perot tuned filter as the coarse adjustment filter, double grating polygonal rotating mirror tuned filter has been realized quick wide-band tuning high spectral resolution sweeping laser output as tweak filter.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model double grating polygonal rotating mirror tuned filter;
In the accompanying drawing: 1-the first semiconductor optical amplifier; 2-the second semiconductor optical amplifier; 3-the one 50%:50% fiber coupler; 4-the first Polarization Controller; 5-Fabry Perot tuned filter; 6-drive waveform device; The 7-synchronizer; 8-double grating polygonal rotating mirror tuned filter; The 9-circulator; 10-the second Polarization Controller; The 11-40%:60% fiber coupler; 12-the 2nd 50%:50% fiber coupler; 13-fiber optic collimator mirror; The 14-polygonal mirror; The 15-electric machine controller; 16-expands grating; 17-auto-collimation grating.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 1, a kind of high spectral resolution broadband rapid frequency-sweeping laser source, by the first semiconductor optical amplifier 1(InPhenix, Inc., IPSAD1301-L213), the second semiconductor optical amplifier 2(InPhenix, Inc., IPSAD1301-L213), the one 50%:50% fiber coupler 3(Lightcomm Technology Co., Ltd., DWC-A-1*2-1315-50/50-1-0-FC/APC), the 2nd 50%:50% fiber coupler 12(Lightcomm Technology Co., Ltd., DWC-A-1*2-1315-50/50-1-0-FC/APC), the first Polarization Controller 4, the second Polarization Controller 10, Fabry Perot tuned filter 5, drive waveform device 6, synchronizer 7, double grating polygonal rotating mirror tuned filter 8, circulator 9 and 40%:60% fiber coupler 11(Lightcomm Technology Co., Ltd., DWC-A-1*2-1315-40/60-1-0-FC/APC) the loop laser vibration chamber that forms
The first semiconductor optical amplifier 1 and the second semiconductor optical amplifier 2 are connected in parallel on an end 12 of a 50%:50% fiber coupler 3 and the 2nd 50%:50% fiber coupler, the one 50%:50% fiber coupler 3 other ends connect the first Polarization Controller 4, this the first Polarization Controller 4 connects the input of Fabry Perot tuned filter 5, drive waveform device 6 connects Fabry Perot tuned filter 5, the output of this Fabry Perot tuned filter 5 connects the first port of circulator 9, the 3rd port of this circulator 9 is connected to the second Polarization Controller 10, connect again 40%:60% fiber coupler 11, this 40%:60% fiber coupler 11 one tunnel is exported through 60% port, another road enters described loop laser vibration chamber
The gain media in loop laser vibration chamber is the semiconductor optical amplifier of polarization insensitive, the centre wavelength of two SOA is respectively 1259nm and 1304nm, spectral region is respectively 145nm(1200-1345nm) and 140nm(1240-1380nm), full width at half maximum is respectively 69nm and 67nm.The spontaneous emission light spectral limit of two SOA has lap 105nm(1240-1345nm), shortwave and long wave are expanded 40nm and 35nm each other.
As shown in Figure 2, described double grating polygonal rotating mirror tuned filter comprises fiber optic collimator mirror 13, polygonal mirror 14, electric machine controller 15, expands grating 16 and auto-collimation grating 17, electric machine controller 15 drives polygonal mirror 14, collimated light penetrates by fiber optic collimator mirror 13, reflex to via polygonal mirror 14 and to expand grating 16, expanded by this again and be diffracted into auto-collimation grating 17 gating different color lights behind the grating 16 and reflect by former road, enter loop laser vibration chamber from Centronics port to the three ports of described circulator 9.
Hyperfine tuned filter mainly is comprised of the double grating combination dispersion system and the polygonal rotating mirror that expand grating-auto-collimation grating based on Li Teman-Littrow structure, utilization expands the dispersion of grating and expands ability, improve the bore of auto-collimation grating incident light, form simultaneously different color light the difference of auto-collimation grating auto-collimation condition is departed from, improve the dispersive power of double grating combination dispersion system.
The utility model discloses a kind of broadband high spectral resolution rapid frequency-sweeping laser source.Gain media adopts two SOA use in parallel, and two SOA spontaneous emission light spectral limits are expanded each other, can remedy the band-limited restriction of single SOA.The Fabry Perot tuned filter is the coarse adjustment filter, overcomes the problem that duty ratio that bilateral scanning brings descends.Double grating polygonal rotating mirror tuned filter is tweak filter, realizes superfine tuningly, obtains the catch light spectral resolution.Both make its simultaneous tuning by synchronizer control.This frequency-sweeping laser source can be realized the sweeping laser output of broadband, high spectral resolution, is the most critical technology of the high frequency sweep Optical Coherence Tomography Imaging Technology of high axial resolution and Depth Imaging area requirement.
Claims (2)
1. high spectral resolution broadband rapid frequency-sweeping laser source, it is characterized in that: by the first semiconductor optical amplifier, the second semiconductor optical amplifier, a 50%:50% fiber coupler, the 2nd 50%:50% fiber coupler, the first Polarization Controller, the second Polarization Controller, Fabry Perot tuned filter, drive waveform device, synchronizer, double grating polygonal rotating mirror tuned filter, circulator and 40%:60% fiber coupler form annular laser oscillation cavity
The first semiconductor optical amplifier and the second semiconductor optical amplifier are connected in parallel on an end of a 50%:50% fiber coupler and the 2nd 50%:50% fiber coupler, the one 50%:50% fiber coupler other end connects the first Polarization Controller, this first Polarization Controller connects the input of Fabry Perot tuned filter, the drive waveform device connects the Fabry Perot tuned filter, the output of this Fabry Perot tuned filter connects the first port of circulator, the 3rd port of this circulator is connected to the second Polarization Controller, connect again the 40%:60% fiber coupler, this 40%:60% fiber coupler one tunnel is exported through 60% port, another road enters described loop laser vibration chamber
The drive waveform device is connected to double grating polygonal rotating mirror tuned filter by synchronizer, and the Centronics port of described circulator connects double grating polygonal rotating mirror tuned filter.
2. high spectral resolution according to claim 1 broadband rapid frequency-sweeping laser source, it is characterized in that: described double grating polygonal rotating mirror tuned filter comprises fiber optic collimator mirror, polygonal mirror, electric machine controller, expansion grating and auto-collimation grating, and electric machine controller drives polygonal mirror;
Collimated light goes out by the fiber optic collimator mirror, reflex to via polygonal mirror and to expand grating, expanded by this again and be diffracted into auto-collimation grating gating different color light behind the grating and reflect by former road, enter loop laser vibration chamber from Centronics port to the three ports of described circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618205 CN202888605U (en) | 2012-11-20 | 2012-11-20 | Rapid frequency sweeping laser light source of hyper-spectral resolution broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220618205 CN202888605U (en) | 2012-11-20 | 2012-11-20 | Rapid frequency sweeping laser light source of hyper-spectral resolution broadband |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202888605U true CN202888605U (en) | 2013-04-17 |
Family
ID=48079996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220618205 Expired - Fee Related CN202888605U (en) | 2012-11-20 | 2012-11-20 | Rapid frequency sweeping laser light source of hyper-spectral resolution broadband |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202888605U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938535A (en) * | 2012-11-20 | 2013-02-20 | 上海理工大学 | Broadband laser source with high spectral resolution and high frequency sweeping speed |
| CN104300358A (en) * | 2014-09-22 | 2015-01-21 | 江苏骏龙电力科技股份有限公司 | Narrow linewidth laser light source for wide-range phase continuous frequency sweeping |
| CN107110636A (en) * | 2014-11-03 | 2017-08-29 | 特鲁塔格科技公司 | Fabry Perot spectral image measurement |
| CN107643248A (en) * | 2017-09-15 | 2018-01-30 | 电子科技大学 | A kind of adjustable swept light source of start wavelength and dutycycle based on multiple surface rotating mirror |
-
2012
- 2012-11-20 CN CN 201220618205 patent/CN202888605U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938535A (en) * | 2012-11-20 | 2013-02-20 | 上海理工大学 | Broadband laser source with high spectral resolution and high frequency sweeping speed |
| CN104300358A (en) * | 2014-09-22 | 2015-01-21 | 江苏骏龙电力科技股份有限公司 | Narrow linewidth laser light source for wide-range phase continuous frequency sweeping |
| CN107110636A (en) * | 2014-11-03 | 2017-08-29 | 特鲁塔格科技公司 | Fabry Perot spectral image measurement |
| CN107643248A (en) * | 2017-09-15 | 2018-01-30 | 电子科技大学 | A kind of adjustable swept light source of start wavelength and dutycycle based on multiple surface rotating mirror |
| CN107643248B (en) * | 2017-09-15 | 2019-11-19 | 电子科技大学 | A kind of adjustable swept light source of start wavelength and duty ratio based on multiple surface rotating mirror |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12013572B2 (en) | Apparatus and methods for high-speed and long depth range imaging using optical coherence tomography | |
| JP5361243B2 (en) | Optical tomographic imaging system | |
| CN202888605U (en) | Rapid frequency sweeping laser light source of hyper-spectral resolution broadband | |
| CA2890548C (en) | Oct system with phase sensitive interference signal sampling | |
| JP2013504216A5 (en) | ||
| US20110292399A1 (en) | Discrete Spectrum Broadband Optical Source | |
| EP2917686B1 (en) | Oct system with tunable clock system for flexible data acquisition | |
| CN102938535A (en) | Broadband laser source with high spectral resolution and high frequency sweeping speed | |
| CN101777728A (en) | Sweep frequency laser light source based on hyperfine tuned filter | |
| Mao et al. | High performance wavelength-swept laser with mode-locking technique for optical coherence tomography | |
| CN107643248B (en) | A kind of adjustable swept light source of start wavelength and duty ratio based on multiple surface rotating mirror | |
| CN201623363U (en) | Sweep frequency laser light source based on ultrafine tuned filter | |
| CN208045930U (en) | A kind of optical fiber laser of length scanning | |
| CN111227797B (en) | Nonlinear effect enhanced sweep frequency light source | |
| CN108365509A (en) | A kind of optical fiber laser of length scanning | |
| Leung et al. | Simultaneous 6-channel optical coherence tomography using a high-power telescope-less polygon-based swept laser in dual-amplifier configuration | |
| Chen et al. | Combined tunable filters based swept laser source for optical coherence tomography | |
| Chen et al. | All-fiber ring-cavity based frequency swept laser source for frequency domain OCT | |
| Huang et al. | 2.5 MHz highly coherent swept source for long-range tomographic detection | |
| Chen et al. | High-speed wide tuning range wavelength swept laser around 1310 nm for frequency domain OCT | |
| Mao et al. | Simultaneous multi-wavelength-band optical frequency domain imaging for spectroscopic investigations | |
| Chen et al. | A NOVEL SWEPT LASER SOURCE BASED ON COMBINED TUNABLE FILTERS FOR OCT | |
| Adler et al. | Coherence length extension of Fourier domain mode locked lasers | |
| Mao et al. | Simultaneous 1310/1550 dual-band swept laser source and fiber-based dual-band common-path swept source optical coherence tomography | |
| Zhang et al. | Polarization maintaining buffered Fourier domain mode-locked swept source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20161120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |