A Ring Cavity Broadband Random Fiber Laser
A fiber laser and ring cavity technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of reducing the output power and bandwidth of the first-order Raman laser, the second-order Raman effect, and low efficiency, and achieve The effect of adjustable coherence, low pumping threshold and wide frequency spectrum
Active Publication Date: 2016-01-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0003] In view of the above prior art, the technical problem to be solved by the present invention is to provide a ring cavity random fiber laser, which can overcome the low efficiency of the traditional Rayleigh scattering effect, and only the back Rayleigh scattering part can be used as optical feedback. Higher threshold pump power, and the generated first-order random laser are easy to cause second-order Raman effect, thereby reducing the shortcomings of the output power and bandwidth of the first-order Raman laser, the present invention is simple in structure and easy to implement
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Embodiment 1
[0020] figure 2 It is the laser output spectrum diagram of an embodiment of the ring cavity random fiber laser, and its corresponding fiber laser structure is as follows figure 1 shown. At this time, the pump light source (1) has a wavelength of 1366nm, and is coupled to a standard single-mode fiber (7) through a 1365 / 1461nm wavelength division multiplexer WDM (3), and its power varies between 0.933W~3.631W . The two ends of the standard single-mode fiber (7) are respectively connected to the common port (8) of the wavelength division multiplexer WDM (3) and the second port (4) of the 1461nm wavelength division multiplexer WDM (3), with a length of 125km and wavelength division multiplexing A 1:99 beam splitter is connected between the two ports (4) of the WDM1461nm wavelength division multiplexer WDM (3) and the standard single-mode fiber (7), and the first-order random laser stable output can be obtained from the 1% port. The threshold is about 0.7W. At the same time, i...
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The invention discloses a ring cavity broadband random fiber laser, which is composed of a pump light source (1), a wavelength division multiplexer WDM (3), a standard single-mode fiber (7) and a beam splitter (5), wherein the wavelength division multiplexer The first port (2) of the WDM (3) is connected to the pump light source (1), the second port (4) and the common end (8) of the wavelength division multiplexer WDM are respectively connected to both ends of the standard single-mode optical fiber (7) to form a closed The loop is a ring resonant cavity; at the same time, a beam splitter (5) is connected between the WDM two ports (4) of the wavelength division multiplexer (4) and the standard single-mode fiber (7) as a random laser output port (6). The ring cavity random fiber laser proposed by the present invention has the advantages of low pumping threshold, adjustable coherence, wide spectrum, stable output, etc., and can be widely used in the fields of optical sensing and optical communication as a new type of broadband light source with simple structure .
Description
technical field [0001] The invention relates to the field of novel fiber lasers, in particular to a ring cavity broadband random fiber laser. Background technique [0002] Random lasing is formed by the multiple scattering amplification of light waves in a random gain medium. When light waves are transmitted in the optical fiber, due to the inherent inhomogeneity of the dielectric material, distributed Rayleigh scattering will occur in the optical fiber, that is, random optical feedback will be formed in space. The weak scattered light accumulates as the transmission distance increases, and is continuously amplified by the Raman scattering effect. When the gain is large enough to offset the loss of the fiber, the emitted laser light can be formed. The randomly distributed feedback fiber laser based on this principle has the advantages of continuous and stable output, long transmission distance and broadband wavelength tunability, and has broad application prospects in the f...
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IPC IPC(8): H01S3/067H01S3/083
Inventor 饶云江张伟利杨自新朱俊梅
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA