Anti-radiation wide-spectrum optical-fiber light source based on photo-bleaching

Abstract

The invention discloses an anti-radiation wide-spectrum optical-fiber light source based on photo-bleaching. The optical-fiber light source is a multi-pump double-pass backward structure and adopts an erbium-doped photo crystal optical fiber as a gain medium. A tail fiber of a 980nm laser is in fusion connection with one end of a first wavelength division multiplexer; a tail fiber of a 810nm laser is in fusion connection with one end of a third wavelength division multiplexer; a tail fiber of a 665nm laser is in fusion connection with the third wavelength division multiplexer; the other two ends of the first wavelength division multiplexer are in fusion connection with a second optical spectrum filter and an erbium-doped photo crystal optical fiber; one end of the second wavelength division multiplexer is in fusion connection with the erbium-doped photo crystal optical fiber, and the other two ends of the second wavelength division multiplexer are in fusion connection with the first optical spectrum filter and the third wavelength division multiplexer; and a fiber leading-out end of the second optical spectrum filter is in fusion connection with a fiber leading-in end of an optical fiber isolator, and a fiber leading-out end of the optical fiber isolator is used as a light output end. Multiple special wavelength lasers are used for simultaneously pump to realize the effective photo-bleaching, so that the stability of the average wavelength and the output power of the erbium-doped optical fiber light source can be guaranteed under the space radiation environment.

Description

technical field [0001] The present invention relates to a broadband optical fiber light source, more particularly, to a radiation-resistant broadband optical fiber light source based on active light fading. Background technique [0002] As a gain and transmission medium of active optical fiber devices, Erbium-doped optical fiber has been widely used in land and submarine long-line or highly distributed communication systems. With the continuous development of space technology, the application potential of active devices based on erbium-doped fiber in space has attracted more and more attention. But the special environment of space full of cosmic rays must be paid attention to. Studies have shown that when special technology is used, pump lasers, ordinary optical fiber devices and device pigtails already have good radiation resistance, while erbium-doped optical fibers are used as gain and transmission media for active optical fiber devices. Different, in addition to doping...

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Problems solved by technology

For the method of thermal fading, it needs to be heated to a very high temperature (300°C) to produce an obvious fading ef

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