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SOA-based ultralow-noise broadband light source for fiber-optic gyroscope

An ultra-low-noise, wide-spectrum light source technology, applied in Sagnac effect gyroscopes, gyroscopes/steering sensing equipment, lasers, etc., can solve the problem of affecting the spectral width of the light source, gain unevenness, and affecting the noise characteristics of the light source intensity, etc. question

Active Publication Date: 2021-09-10
BEIJING AEROSPACE TIMES OPTICAL ELECTRONICS TECH
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Problems solved by technology

Especially in the application of SOA in the noise reduction process of erbium-doped fiber light source, this phenomenon of uneven gain will directly affect the spectral width of the light source, and then affect the relative intensity noise characteristics of the light source

Method used

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Embodiment Construction

[0031] In order to make the solution of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0032] The SOA-based ultra-low noise wide-spectrum light source for fiber optic gyroscopes of the present invention is a wide-spectrum light source suitable for strategic-level high-precision fiber optic gyroscopes.

[0033] Such as figure 1 Shown, a kind of SOA-based fiber optic gyroscope of the present invention uses the structural diagram of ultra-low noise broadband light source, comprises pumping laser 1, wavelength division multiplexer 2, erbium-doped optical fiber 3, adjustable attenuator 4, Faraday rotation Mirror 5, optical fiber isolator 6, semiconductor optical amplifier 7; the pigtail of pump laser 1 is welded to the first joint 21 of wavelength division multiplexer 2; the second joint 22 of wavelength division multiplexer 2 is connected to optical fiber isolator 6 The...

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Abstract

The invention relates to an SOA-based ultralow-noise broadband light source for a fiber-optic gyroscope. The broadband light source is composed of a two-way backward structure erbium-doped fiber light source and an SOA, and comprises a 980 nm laser, a wavelength division multiplexer, an erbium-doped fiber, an adjustable attenuator, a Faraday rotator mirror, a fiber isolator and the SOA (semiconductor optical amplifier). In order to obtain the maximum noise reduction effect, optimization design is carried out from two aspects: RIN (relative intensity noise) suppression and output spectrum broadening. On one hand, the injection current of the SOA and the pump laser is accurately adjusted, so that the SOA works in a deep saturation state; on the other hand, the optical path loss coefficient is optimized, so that the light source has the maximum output spectrum width. Compared with an erbium-doped fiber light source with the same spectrum type, the wide-spectrum light source has the characteristics of ultralow relative intensity noise, simple structure and convenience in integration, and has important significance in application of strategic high-precision fiber-optic gyroscopes.

Description

technical field [0001] The invention relates to a wide-spectrum fiber optic light source, more particularly to an ultra-low noise wide-spectrum light source for an SOA-based fiber optic gyroscope. Background technique [0002] As high-precision inertial navigation and guidance systems have higher and higher requirements for fiber optic gyroscopes, the development of strategic high-precision fiber optic gyroscopes has important theoretical and military significance. [0003] Among the various light sources used in high-precision fiber optic gyroscope systems, broadband light sources can effectively reduce system coherence errors caused by backscattering, back reflection, polarization cross-coupling, Kerr effect and various environmental noises. It is the preferred light source for high-precision fiber optic gyroscopes. However, with the continuous deepening of research on fiber optic gyroscopes at home and abroad, the relative intensity noise of broadband light sources has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72H01S3/067H01S5/50
CPCG01C19/72G01C19/721H01S3/06716H01S5/50
Inventor 索鑫鑫向政于海成汤梦希谢培葛宏升郑晓娟王利超吴旭东刘加林陈义杰王腾赵海明魏松梅
Owner BEIJING AEROSPACE TIMES OPTICAL ELECTRONICS TECH
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