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Narrow-band depolarization laser system

A laser system and depolarization technology, applied in the field of optical information processing, can solve the problems of poor working stability and bulky depolarizer.

Pending Publication Date: 2022-05-17
SHANGHAI UNIV
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Problems solved by technology

Since the coherence length of light is inversely proportional to its spectral width, the existing depolarization technology is only suitable for the depolarization of broadband light sources, while for narrowband light sources, the depolarizer will be bulky and difficult to work due to its requirement for an ultra-long delay path. poor stability

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  • Narrow-band depolarization laser system
  • Narrow-band depolarization laser system
  • Narrow-band depolarization laser system

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Embodiment Construction

[0035] Preferred embodiments of the present invention are described as follows in conjunction with the accompanying drawings:

[0036] see figure 1 , a narrow-band depolarization laser system, comprising a pump light source 1, an erbium-doped fiber amplifier 2, a single-mode fiber polarization controller 3, a first polarization-maintaining fiber coupler 4, a first polarization-maintaining fiber circulator 5, a first polarization-maintaining fiber Polarization fiber 6, first fiber isolator 7, second polarization maintaining fiber circulator 8, second polarization maintaining fiber 9, second fiber isolator 10, and second polarization maintaining fiber coupler 11; wherein the first polarization maintaining fiber The ② port of the coupler 4 is matched and connected in parallel with the main axis of the polarization-maintaining fiber of the ① port of the first polarization-maintaining optical fiber circulator 5; the ② port of the first polarization-maintaining optical fiber cir...

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Abstract

The invention discloses a narrowband depolarization laser system, which is characterized in that two paths of polarization-maintaining fiber Brillouin random laser systems are constructed by utilizing the axial certainty of a stimulated Brillouin scattering polarization traction effect in polarization-maintaining fibers and combining SBS narrowband gain spectrum characteristics; two paths of Brillouin random laser with independent oscillation, equal power, equal oscillation wavelength and polarization state strictly clamped on the main shaft of the polarization maintaining optical fiber are generated, and then polarization orthogonal wave combination is performed on the two paths of laser, so that completely depolarized narrow-band depolarized laser is realized, and the requirement on an ultra-long delay path in a general narrow-band depolarization technology is not needed.

Description

technical field [0001] The invention relates to a narrow-band depolarization laser system, which is applied to optical fiber communication and optical fiber sensing systems, and belongs to the field of optical information processing. Background technique [0002] The random birefringence caused by waveguide and material anisotropy in optical fibers leads to the ubiquitous polarization impairment problems in optical fiber communication and sensing measurement systems, including polarization fading, polarization phase noise, polarization mode dispersion, and polarization-dependent loss / gain, etc. Therefore, the polarization control technology to solve the above polarization-related problems is an indispensable key technology in optical fiber communication and sensing systems. Polarization control technology is mainly classified into: full optical path polarization maintenance, polarization feedback control, polarization diversity reception, polarization perturbation depolariza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S3/30H01S3/067
CPCH01S3/10061H01S3/067H01S3/302
Inventor 谷祥王春华吴科帅宁金星方捻高瑞娟李力
Owner SHANGHAI UNIV
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