Anti-radiation wide spectrum fiber light source

Abstract

The invention discloses an anti-radiation wide spectrum fiber light source. 980nm pump light can be coupled in an Er-doped fiber by a wavelength division multiplexer (WDM), and mixed light is output after the light is amplified through spontaneous emission (ASE) of erbium ions; the mixed light can generate reflected light after being processed by a second WDM and a reflecting mirror; the remnant 980nm pump light output from the second WDM can be converted to a voltage signal by a 980nm monitoring detector, and the voltage signal can act on a 980nm pump light source after being processed by a microprocessor and a digital constant current source; and an automatic temperature control circuit can ensure the 980nm pump light source to work at the temperature of 25 DEG C. The wide spectrum fiber light source provided by the invention utilizes the electrical signal output by the 980nm monitoring detector as a basis of feedback regulation and regulates drive current to control the stability of power and average wavelength of the output ASE light by using the negative feedback closed loop control principle, and thus the anti-radiation problem of the wide spectrum fiber light source can be well solved by using an active protective technology under the condition of not increasing the weight of the light source system.

Description

technical field [0001] The invention relates to a broadband optical fiber light source, more particularly to a radiation-resistant broadband optical fiber light source based on edge filtering technology. Background technique [0002] Erbium-doped fiber is widely used in optical devices such as superfluorescent fiber light source, fiber laser and erbium-doped fiber amplifier. The above optical devices have unique advantages due to high reliability and low thermal sensitivity coefficient, so they are widely used in the field of optical fiber communication and sensing. In recent years, more and more people pay attention to the application of Erbium-doped fiber devices in the space environment. However, people must pay attention to the special environment full of cosmic rays in space. The impact of high-energy radiation particles on the characteristics of erbium-doped optical fibers and the performance of other waveguide devices is particularly significant. They may change the ...

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Problems solved by technology

In addition, the erbium-doped fiber produces a color center under irradiation conditions, and the formation of the color center increases the loss of the erbium-doped fiber

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