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Single-frequency nanosecond pulse fiber raman amplifier

A technology of Raman amplifiers and nanosecond pulsed lasers, applied in lasers, laser components, optics, etc., can solve the problems of limiting the maximum output power of single-frequency Raman amplifiers, device damage, and technical difficulty, and achieve great practical value , easy to implement, and simple in structure

Active Publication Date: 2013-02-13
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, since the SBS threshold is much lower than the SRS threshold in single-frequency CW fiber lasers, SBS limits the maximum output power of single-frequency Raman amplifiers and even causes device damage
Generally, it is necessary to suppress SBS by applying stress to the optical fiber, but these methods are technically difficult and the laser amplification system is too complicated

Method used

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  • Single-frequency nanosecond pulse fiber raman amplifier

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Embodiment Construction

[0016] figure 1 It is a structural schematic diagram of the single-frequency nanosecond pulse fiber Raman amplifier of the present invention. As can be seen from the figure, the composition of the single-frequency nanosecond pulse fiber Raman amplifier of the present invention includes a single-frequency nanosecond pulse laser seed source 1, an isolator 2, a laser delay device 3, a pump laser 4, and a signal / pump laser combination The device 5 and the energy-transmitting optical fiber 6 are sequentially connected into one body through an optical fiber fusion splicer.

[0017] Work engineering of the present invention is:

[0018] The seed light emitted by the single-frequency nanosecond pulse laser seed source first passes through the isolator, then passes through the laser delay device, and finally enters the energy transmission fiber from the signal end of the signal / pump laser beam combining device, and the pump light emitted by the pump laser passes through the The pump ...

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Abstract

The invention relates to a single-frequency nanosecond pulse fiber raman amplifier. The amplifier is formed by orderly connecting a single-frequency nanosecond pulse laser seed source (1), an isolator (2), a laser delay device (3), a pumping laser (4), a signal / pumping laser beam combiner (5) and an energy transfer fiber (6) into a whole through a fusion splicer. According to the single-frequency nanosecond pulse fiber raman amplifier, nanosecond pulse laser is led as a seed source and a pumping source, so that limitation of stimulated Brillouin scattering (SBS) effect on output power is removed; and the single-frequency nanosecond pulse fiber raman amplifier has the advantages of narrow line width, narrow pulse width, high peak power, flexible gain wavelength, low amplified spontaneous radiation noise, simple structure, and the like, and has a great application prospect.

Description

technical field [0001] The invention relates to a single-frequency nanosecond pulse optical fiber Raman amplifier, which is an all-fiber amplifier with the advantages of narrow line width, narrow pulse width, high peak power, flexible gain wavelength, low noise of amplified spontaneous radiation, and simple structure. amplifier. technical background [0002] Laser radar, laser guide star, atmospheric remote sensing, laser display, nonlinear frequency conversion and gravitational wave detection and other fields require single-frequency laser light sources with special wavelengths. The laser amplifier output obtained directly by the stimulated radiation of the gain medium only accounts for a small part of the entire spectral range, and the laser output of some special bands cannot be amplified by this method. Fiber amplifiers have the advantages of good beam quality, high conversion efficiency, convenient thermal management, and compact structure, and have become a research h...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/094G02F1/39
Inventor 粟荣涛周朴肖虎王小林马阎星司磊许晓军
Owner NAT UNIV OF DEFENSE TECH
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