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An online wavelength calibration device and method for a dbr tunable laser

A technology for tuning lasers and calibrating devices, used in lasers, laser parts, semiconductor lasers, etc., can solve problems such as incompatibility, low wavelength sensitivity, and large wavelength interval of interferometers, achieve high wavelength control accuracy, and reduce wavelength control errors. , the effect of accurately controlling the error

Active Publication Date: 2019-05-24
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

This method also utilizes the spectral peak section with low wavelength sensitivity, and the wavelength interval of the interferometer is relatively large, so it is not suitable for application in fiber grating demodulators

Method used

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  • An online wavelength calibration device and method for a dbr tunable laser
  • An online wavelength calibration device and method for a dbr tunable laser
  • An online wavelength calibration device and method for a dbr tunable laser

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and specific implementation case the present invention is described in further detail:

[0034] figure 1 It is a structural schematic diagram of the online wavelength calibration device of the DBR tunable laser of the present invention. Such as figure 1 As shown, the device includes:

[0035] DBR tunable laser 1 , coupler 2 , interferometer 3 , photodetector 4 , signal acquisition and processing circuit 5 , and laser drive circuit 6 .

[0036] The coupler 2 receives the optical signal generated by the external DBR tunable laser 1, and transmits the reflected light to the photodetector 4;

[0037] The interferometer 3 receives the optical signal sent by the coupler 2, and generates reflected light and then sends it back to the coupler 2;

[0038] The photodetector 4 converts the optical signal into an electrical signal, and transmits it to the signal acquisition and processing circuit 5;

[0039] The signal acquisition ...

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Abstract

The invention discloses an on-line wavelength calibration device and a method of a DBR (distributed bragg reflector) tunable laser. The device comprises a coupler, an interferometer, a photoelectric detector, a signal acquisition and processing circuit and a laser driving circuit. A reflection spectrum of the interferometer is of a cosine type; output wavelengths of the DBR tunable laser are set at a pi / 2 phase of the reflection spectrum of the interferometer; when an optical signal acquired by the signal acquisition and processing circuit deviates from the pi / 2 phase, a newly generated control parameter of the DBR tunable laser is transmitted to the laser driving circuit; and the laser driving circuit changes control current of the DBR tunable laser, so that the output wavelengths of theDBR tunable laser are locked at the pi / 2 phase of the reflection spectrum of the interferometer all the time. According to the device and the method, the interferometer is introduced for monitoring and feedback control of the wavelengths of the DBR tunable laser, and a wavelength control error during long-term usage of the DBR tunable laser can be effectively decreased.

Description

technical field [0001] The invention relates to the field of wavelength calibration of tunable lasers, in particular to an on-line wavelength calibration device and method for a DBR tunable laser applied to a fiber grating demodulator. Background technique [0002] As a new type of wide tunable semiconductor laser, DBR tunable laser has the advantages of wide wavelength tuning range, fast tuning speed, low cost, high output power, good stability, and easy integration with other devices. It is a new generation of WDM systems and Key optoelectronic devices for all-optical networks. At the same time, in the field of optical fiber sensing, domestic and foreign companies have also successively developed fiber grating demodulator products based on DBR tunable lasers. [0003] The DBR tunable laser obtains the curve between the laser wavelength and the control current through pre-calibration of the wavelength. Using the calibration curve can ensure short-term and room temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/125H01S5/042
CPCH01S5/042H01S5/125
Inventor 王明超唐才杰王学锋蓝天
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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