A semi-open-cavity multi-wavelength Brillouin-erbium-doped fiber random laser
A technology of random lasers and erbium-doped optical fibers, which is applied in the field of random lasers, can solve the problems of small Brillouin orders and weak optical feedback of Brillouin signals, and achieve the effect of improving performance
Active Publication Date: 2020-12-04
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0007] Purpose of the invention: the purpose of the present invention is to provide a semi-open-cavity multi-wavelength Brillouin-erbium-doped fiber random laser, which solves the problem that the light feedback of the Brillouin signal in the random fiber laser is weak, and the number of Brillouin orders that can be produced by cascading is small The problem
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[0023] Such as figure 1 As shown, the semi-open-cavity multi-wavelength Brillouin-erbium-doped fiber random laser includes two pump sources 1, two wavelength division multiplexers 2, an erbium-doped fiber 3, a single-mode fiber 4, a first isolator 5, a ring Device 6, second isolator 7, 3-dB coupler 8, Brillouin pump source 9, spectrometer 10. The random laser has a semi-open cavity structure, consisting of an open loop part on the left and a straight line part on the right. The two parts are connected by a circulator 6, wherein the circulator 6 has three ports A, B and C.
[0024] Both sides of the erbium-doped fiber 3 are provided with a pumping source 1 and a wavelength division multiplexer 2; the output end of the pumping source 1 is connected with the input end of the wavelength division multiplexer 2, and the output end of the wavelength division multiplexer 2 Connect with the erbium-doped fiber 3; the signal input end of the wavelength division multiplexer 2 on one side...
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Abstract
The invention discloses a semi-open cavity multi-wavelength Brillouin-erbium-doped fiber random laser. An output end of a pump source is connected to an input end of a wavelength division multiplexer,an output end of the wavelength division multiplexer is connected to an erbium-doped fiber, an input end of the wavelength division multiplexer on the side of the erbium-doped fiber is connected to one end of a single-mode fiber, the other end of the single-mode fiber is connected to a first isolator, a signal input end of the wavelength division multiplexer on the other side of the erbium-dopedfiber is connected to a B port of a circulator, an A port and a C port of the circulator are connected to an output end of the second isolator and an input port of a 3-dB coupler, the other input portof the 3-dB coupler is connected to an output end of a Brillouin pump source, an output end of the 3-dB coupler is connected to an input end of the second isolator, and the other output end of the 3-dB coupler is connected to an input end of a spectrometer. The Brillouin signal light of the present invention achieves a greater gain, and higher-order Brillouin Stokes light can be produced.
Description
technical field [0001] The invention relates to a random laser, in particular to a half-open cavity multi-wavelength Brillouin-erbium-doped fiber random laser. Background technique [0002] The concept of random laser was first proposed by Ambartsumyan et al. in 1966. Compared with traditional lasers, random lasers do not have a fixed optical resonator, and their optical feedback is realized by the multiple scattering effect in the disordered medium. The interference effect of scattered light is used to generate a resonance mode of a specific frequency to achieve random laser output. The potential applications of random lasers in fiber optic sensing, physical optics imaging, spectrometry, microwave photonics, and biomedicine have attracted considerable research interest in recent decades. [0003] The random laser has no fixed optical resonant cavity. The working principle is that the light is scattered multiple times in the disordered medium to realize the feedback. The in...
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IPC IPC(8): H01S3/067H01S3/108H01S3/30
CPCH01S3/06716H01S3/06783H01S3/1086H01S3/302
Inventor 张祖兴吉照宇黄萍梅杰蒋奇
Owner NANJING UNIV OF POSTS & TELECOMM