CN101776518A - Method and device for detecting spectral characteristics of optical device - Google Patents
Method and device for detecting spectral characteristics of optical device Download PDFInfo
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- CN101776518A CN101776518A CN201010039651A CN201010039651A CN101776518A CN 101776518 A CN101776518 A CN 101776518A CN 201010039651 A CN201010039651 A CN 201010039651A CN 201010039651 A CN201010039651 A CN 201010039651A CN 101776518 A CN101776518 A CN 101776518A
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Abstract
The invention relates to a method and a device for detecting spectral characteristics of an optical device. A conventional detection instrument has a complex structure and high price. The method comprises the following steps of: firstly, selecting a proper Fourier domain mode-locked fiber laser, an opto-isolator, an optical power divider and photoelectric probes; secondly, connecting an optical device to be detected with a detection device; and finally, calculating the spectrum of the optical device to be detected according to a reference signal and a measurement signal which are acquired according to a data processing module. Laser emitted by the Fourier domain mode-locked fiber laser of the device is divided into two paths through the opto-isolator and the optical power divider; one path of laser runs through the optical device to be detected and the photoelectric probe and is connected with the data processing module; and the other path of laser runs through the other photoelectric probe and is connected with the data processing module. The invention has the advantages of wide measurement range, low cost and simple method.
Description
Technical field
The invention belongs to the optical detective technology field, particularly a kind of method of the detection optics spectral characteristic based on the Fourier domain mode-locking fiber laser, and the device of realizing this method.
Background technology
Spectral characteristic is one of most important characteristic of optical device, is the important indicator of estimating the optical device performance.The spectral characteristic of optical device comprises its transmitted spectrum and reflectance spectrum.Such as aspect the optical fibre device, as various wave filters such as Fiber Bragg Grating FBG, long period fiber grating, the characteristic of its core shows as the transmitted spectrum or the reflectance spectrum of this device; Devices such as picture fiber coupler, optical fibre wavelength-division multiplex, its important characteristic shows as the work spectral range of this device.
In the optical detective technology field, detection optics spectral characteristic proven technique scheme the most is to adopt wideband light source and spectrometric instrument to realize that the optical device spectral characteristic detects.At present, the wideband light source technology in certain spectral range is very ripe, and the price of wideband light source also is cheaper.Yet commercial spectrometric instrument price is high, and domestic consumer is difficult to bear its expense.The main devices that constitutes spectrometric instrument comprises accurate optical-mechanical system and CCD system, and its cost is difficult to lower again.Therefore, the technical scheme based on wideband light source and spectrometric instrument detection optics spectral characteristic has limited its large-scale application owing to it is with high costs.Invent and a kind ofly be suitable for detection optics spectral characteristic method domestic consumer, cheap and install significant.
Summary of the invention
The present invention is exactly at the deficiencies in the prior art, has proposed a kind of method of the detection optics spectral characteristic based on the Fourier domain mode-locking fiber laser, and the device of realizing this method is provided simultaneously.
Method of the present invention may further comprise the steps:
Step (1) is selected suitable Fourier domain mode-locking fiber laser, optoisolator, optical fiber power splitter and photoelectric probe according to the work spectral range of optical device to be measured, and the work spectral range of selected above-mentioned device should be able to cover the spectral range of optical device to be measured;
Step (2) is connected the output port of Fourier domain mode-locking fiber laser and the input port fiber of optoisolator; The output port of optoisolator and the input port fiber of optical fiber power splitter are connected; An output port of optical fiber power splitter and the input port fiber of a photoelectric probe are connected, another output port of optical fiber power splitter and the input port fiber of optical device to be measured are connected; The output port of optical device to be measured is connected with the input port fiber of another photoelectric probe; The output port of two photoelectric probe is connected with the data processing module signal respectively;
Step (3) Fourier domain mode-locking fiber laser output Wavelength of Laser changes in time, obtains reference signal I by data processing module after the laser of an output port output of optical fiber power splitter enters photoelectric probe
Ref=f
Ref(t)=F
Ref(λ), f wherein
Ref(t) be the reference signal function of time, F
Ref(λ) be the reference signal function of wavelength; Directly connect photoelectric probe from the laser of another output of optical fiber power splitter, obtain measuring-signal I
s=f
s(t)=F
s(λ), f
s(t) be the measuring-signal function of time, F
s(λ) be the measuring-signal function of wavelength; The transmitted spectrum T of optical device to be measured is expressed as:
T＝I
s-I
ref＝F
s(λ)-F
ref(λ)
Build the Fourier domain mode-locking fiber laser and carry out data processing acquisition measurement result and be existing mature technology by data processing module.
The device of realizing the inventive method comprises Fourier domain mode-locking fiber laser, optoisolator, optical fiber power splitter, photoelectric probe, data processing module.The input port fiber of Fourier domain mode-locking optical fiber laser output end mouth and optoisolator is connected; The output port of optoisolator is connected with the input port fiber of optical fiber power splitter; An output port of optical fiber power splitter and the input port fiber of a photoelectric probe are connected, and another output port of optical fiber power splitter and the input port fiber of optical device to be measured are connected; The output port of optical device to be measured is connected with the input port fiber of another photoelectric probe; The output port of two photoelectric probe is connected with the data processing module signal respectively.
The present invention mainly is applicable to the transmitted spectrum characteristic of the optical device of measuring the band optical fiber interface, utilized the time dependent characteristic of Fourier domain mode-locking fiber laser output laser spectrum, by the transmission measurement signal of optical device to be measured and the spectral characteristic that relatively obtains optical device to be measured of reference signal, be existing mature technology and build the Fourier domain mode-locking fiber laser and carry out data processing acquisition measurement result by data processing module.Measurement range of the present invention is big, and is with low cost, and method is simple.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the transmitted light spectrogram of Sa Ke Nader fiber annular device among the embodiment.
Embodiment
As shown in Figure 1, the device of detection optics spectral characteristic comprises Fourier domain mode-locking fiber laser 1, optoisolator 2, optical fiber power splitter 3, the first photoelectric probe 5-1, the second photoelectric probe 5-2 and data processing module 6.
The output port of Fourier domain mode-locking fiber laser 1 is connected by optical fiber with the input port of optoisolator 2; The output port of optoisolator 2 is connected by optical fiber with the input port of optical fiber power splitter 3; An output port of optical fiber power splitter 3 is connected by optical fiber with the input port of the first photoelectric probe 5-1, and another output port of optical fiber power splitter 3 is connected by fiber port with the input of optical device 4 to be measured; The output port of optical device 4 to be measured is connected by optical fiber with the input port of the second photoelectric probe 5-2; The first photoelectric probe 5-1 is connected with data processing module 6 signals respectively with the second photoelectric probe 5-2.Optical device 4 to be measured can be Sa Ke Nader optical fiber circulator, Fiber Bragg Grating FBG, long period fiber grating, wavelength division multiplexer, optical fiber FP wave filter etc.Select for use Sa Ke Nader optical fiber circulator to describe in the present embodiment
Utilize the concrete detection method of this pick-up unit may further comprise the steps:
(1) selects suitable Fourier domain mode-locking fiber laser 1, optoisolator 2, optical fiber power splitter 3 and photoelectric probe for use according to the work spectral range (1540nm-1560nm) of Sa Ke Nader optical fiber circulator 4 to be measured, the work spectral range of the above-mentioned device of selecting for use is (1530nm-1570nm), has covered the spectral range of optical device to be measured.
(2) output port of Fourier domain mode-locking fiber laser 1 and the input port fiber of optoisolator 2 are connected; The output port of optoisolator 2 and the input port fiber of optical fiber power splitter 3 are connected; Output port of optical fiber power splitter 3 and the input port fiber of the first photoelectric probe 5-1 are connected, another output port of optical fiber power splitter 3 and the input port fiber of Sa Ke Nader optical fiber circulator 4 to be measured are connected; The output port of Sa Ke Nader optical fiber circulator 4 to be measured is connected with the input port fiber of the second photoelectric probe 5-2; The first photoelectric probe 5-1 is connected with data processing module 6 signals respectively with the second photoelectric probe 5-2.
(3) Fourier domain mode-locking fiber laser 1 output Wavelength of Laser changes in time, the laser of exporting from a port of optical fiber power splitter 3 enters the second photoelectric probe 5-2 through Sa Ke Nader optical fiber circulator 4 to be measured, can obtain a measuring-signal I from processing module
s=f
s(t)=F
s(λ); Directly be connected from the laser of another output of optical fiber power splitter, can obtain a reference signal I with the first photoelectric probe 5-1 optical fiber
Ref=f
Ref(t)=F
Ref(λ); Then the transmitted spectrum T of optical device to be measured is expressed as:
T＝I
s-I
ref＝F
s(λ)-F
ref(λ)
Promptly obtain the transmitted light spectrogram of Sa Ke Nader optical fiber circulator to be measured as shown in Figure 2.
The present invention has utilized the Fourier domain mode-locking fiber laser that has just been grown up in recent years, by detection system reasonable in design, has proposed the new solution of detection optics spectral characteristic.The present invention does not relate to main spectrometric instrument at present, has reduced the measurement cost widely.The device that the present invention adopts is the optical fiber compatibility, is particularly suitable for the spectral detection of optical fibre device, and is with low cost.
Claims (2)
1. the method for detection optics spectral characteristic is characterized in that this method comprises the steps:
Step (1) is selected Fourier domain mode-locking fiber laser, optoisolator, optical fiber power splitter and photoelectric probe according to the work spectral range of optical device to be measured, and the work spectral range of selected above-mentioned device can cover the spectral range of optical device to be measured;
Step (2) is connected the output port of Fourier domain mode-locking fiber laser and the input port fiber of optoisolator; The output port of optoisolator and the input port fiber of optical fiber power splitter are connected; An output port of optical fiber power splitter and the input port fiber of a photoelectric probe are connected, another output port of optical fiber power splitter and the input port fiber of optical device to be measured are connected; The output port of optical device to be measured is connected with the input port fiber of another photoelectric probe; The output port of two photoelectric probe is connected with the data processing module signal respectively;
Step (3) Fourier domain mode-locking fiber laser output Wavelength of Laser changes in time, obtains reference signal I by data processing module after the laser of an output port output of optical fiber power splitter enters photoelectric probe
Ref=f
Ref(t)=F
Ref(λ), f wherein
Ref(t) be the reference signal function of time, F
Ref(λ) be the reference signal function of wavelength; Directly connect photoelectric probe from the laser of another output of optical fiber power splitter, obtain measuring-signal I
s=f
s(t)=F
s(λ), f
s(t) be the measuring-signal function of time, F
s(λ) be the measuring-signal function of wavelength; Then the transmitted spectrum T of optical device to be measured is: T=I
s-I
Ref=F
s(λ)-F
Ref(λ).
2. the device of detection optics spectral characteristic comprises Fourier domain mode-locking fiber laser, optoisolator, optical fiber power splitter, photoelectric probe, data processing module, it is characterized in that: the input port fiber of Fourier domain mode-locking optical fiber laser output end mouth and optoisolator is connected; The output port of optoisolator is connected with the input port fiber of optical fiber power splitter; An output port of optical fiber power splitter and the input port fiber of a photoelectric probe are connected, and another output port of optical fiber power splitter and the input port fiber of optical device to be measured are connected; The output port of optical device to be measured is connected with the input port fiber of another photoelectric probe; The output port of two photoelectric probe is connected with the data processing module signal respectively.
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| CN2010100396513A CN101776518B (en) | 2010-01-12 | 2010-01-12 | Method and device for detecting spectral characteristics of optical device |
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| CN2010100396513A CN101776518B (en) | 2010-01-12 | 2010-01-12 | Method and device for detecting spectral characteristics of optical device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110987017A (en) * | 2019-12-18 | 2020-04-10 | 株洲菲斯罗克光电技术有限公司 | System and method for testing spectral characteristics of optical fiber isolator |
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| JP3250426B2 (en) * | 1995-09-27 | 2002-01-28 | 安藤電気株式会社 | Optical spectrum measurement device |
| US6151112A (en) * | 1997-11-17 | 2000-11-21 | Innovative Lasers Corp. | High-resolution, compact intracavity laser spectrometer |
| CN100401028C (en) * | 2005-03-18 | 2008-07-09 | 中国科学院上海光学精密机械研究所 | All-fiber cavity ring-down absorption spectrum detection sensing device |
| CN101285771B (en) * | 2008-06-04 | 2010-08-04 | 中国科学院长春光学精密机械与物理研究所 | Miniature Fourier transform spectrometer manufacture method |
| CN201575897U (en) * | 2010-01-12 | 2010-09-08 | 浙江师范大学 | Device for detecting spectral characteristics of optical device |
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| CN110987017A (en) * | 2019-12-18 | 2020-04-10 | 株洲菲斯罗克光电技术有限公司 | System and method for testing spectral characteristics of optical fiber isolator |
| CN110987017B (en) * | 2019-12-18 | 2020-11-03 | 株洲菲斯罗克光电技术有限公司 | System and method for testing spectral characteristics of optical fiber isolator |
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