Multi-wavelength narrow-linewidth laser output method based on micro-groove fiber
An output method and micro-groove technology, applied in the laser field, can solve problems such as high cost, complex structure, and large volume, and achieve the effects of eliminating length limitations, improving signal strength, and realizing Rayleigh gain accumulation
Active Publication Date: 2018-11-02
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology
[0003] Existing methods for forming narrow linewidth single longitudinal mode laser beams mainly include short cavity, saturable absorber, annular cavity, etc., but most of them have the defects of complex structure, large volume, high cost, and unsatisfactory linewidth compression effect. application of multi-wavelength narrow-linewidth laser beams
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[0018] Such as Figure 1a with Figure 1b As shown, this embodiment includes a 980nm pump laser 1, a wavelength division multiplexer 2, a section of erbium-doped optical fiber 3, a three-port circulator 4, a section of micro-groove optical fiber 5, and an optical fiber with a center wavelength of 1530.528nm Grating 6, a variable optical attenuator 7, a polarization controller 8, a fiber Bragg grating 9 with a center wavelength of 1541.132 nm, a fiber Bragg grating 10 with a center wavelength of 1550.527 nm, and a 1*2 coupler 11;
[0019] A specific method for realizing multi-wavelength narrow-linewidth laser output includes the following steps:
[0020] (1) Select micro-groove fiber 5, said micro-groove fiber is made by micro-machining of ordinary single-mode fiber 12 by femtosecond laser, and write two deep 6-7 microns on the surface of single-mode fiber with femtosecond laser Symmetrical micro-groove 5-1, through multiple writing operations, multiple pairs of micro-groove a...
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The invention discloses a multi-wavelength narrow linewidth laser output method based on a micro-groove fiber. The multi-wavelength narrow linewidth laser output method based on the micro-groove fiber is applicable for the field of multi-wavelength narrow line-width fiber laser devices; multiple fiber bragg gratings with different central wavelengths are adopted for the selection of multiple lasers with different wavelengths; the micro-groove fiber is utilized to achieve Rayleigh gain accumulation, so that linewidth narrowing can be carried out for multi-wavelength narrow linewidth laser output. The multi-wavelength narrow linewidth laser output method based on the micro-groove fiber provided by the invention can be applied to optical communication, optical sensing, and other fields, and has the advantages of stable structure, low cost and the like.
Description
technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a multi-wavelength narrow-linewidth laser output method based on a micro-groove fiber. Background technique [0002] With the development and maturity of high-capacity optical fiber communication networks, wavelength division multiplexing technology has become the mainstream technology for long-distance communication trunk lines and optical networks. Multiwavelength fiber lasers have been extensively studied as important light sources in wavelength routing networks. At the same time, multi-wavelength fiber lasers have the advantages of stable performance, high output power, and easy compatibility with fiber optic communication systems. They have broad prospects in fiber optic sensing systems, optical testing, and spectroscopy. At present, the research on multi-wavelength fiber lasers mainly focuses on high power and narrow linewidth, and the research on multi-waveleng...
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IPC IPC(8): H01S3/08H01S3/00
CPCH01S3/0057H01S3/08013
Inventor 陈达如王晓亮李海涛
Owner ZHEJIANG NORMAL UNIVERSITY