Narrow-band fiber laser for mixed medium microcavity full-optical tuning

A fiber laser, mixed medium technology, applied in the laser, laser parts, structure/shape of the active medium, etc., can solve the problems of reducing the compactness and stability of the laser system, achieve compact structure, high immunity, and improve gain and the effect of laser output power

Inactive Publication Date: 2015-11-25
NANJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

However, using a long cavity or introducing more mode selection and wavelength tuning devices in the cavity will increase the probability of laser frequency and intensity noise, reducing the compactness and stability of the laser system

Method used

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  • Narrow-band fiber laser for mixed medium microcavity full-optical tuning
  • Narrow-band fiber laser for mixed medium microcavity full-optical tuning
  • Narrow-band fiber laser for mixed medium microcavity full-optical tuning

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Embodiment Construction

[0027] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] The invention utilizes the whispering gallery mode resonance spectrum in the mixed-medium microcavity as a narrow-band mode selection method of the fiber laser, and performs all-fiber and high-efficiency coupling of the mixed-medium microcavity and the fiber laser resonator through a tapered optical fiber. The pure medium microcavity is covered with a high thermo-optic coefficient and high refractive index dielectric film to construct a mixed medium microcavity. Control the optical gain in the fiber resonator to change the light intensity coupled into the microcavity. Under the thermo-optic effect of the cladding medium film, change the refractive index of the cladding medium of the mixed medium microcavity, and obtain the changing peak wavelength of the resonance spectrum of the whispering gallery mode. Narrowband fiber laser mode se...

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Abstract

The invention discloses a narrow-band fiber laser for mixed medium whisper gallery mode microcavity full-optical tuning. The fiber laser comprises a semiconductor laser pump source, a wavelength division multiplexer, a gain fiber, a fiber isolator, an optical coupler, a polarization controller and a tapering fiber coupling mixed medium microcavity, wherein the units are connected end to end in a fiber coupling manner to form a fiber resonant cavity in a closed manner. The tapering fiber coupling mixed medium microcavity is taken as a mode selection unit in the fiber resonant cavity, light is coupled into the microcavity through one end of a tapering fiber, total reflection transmission is carried out on each end face to form a whisper gallery resonance mode, and the light is returned to the fiber resonant cavity through the other end of the tapering fiber. The mixed medium microcavity is composed of two or more than two layers of media, namely one or more layers of medium films with high index of refraction, great thermo-optical coefficient and high light transmissivity are wrapped on the inner layer medium surface of the microcavity. The laser has the characteristics of large wavelength coverage full-optical tenability, compact strucutre, good monochromaticity and the like.

Description

technical field [0001] The invention relates to a narrow-band fiber laser system with mixed-medium microcavity all-optical tuning, and belongs to the technical field of fiber lasers. Background technique [0002] Due to its advantages of all-fiber, high coherence and tunability, high efficiency, and compact structure, wavelength-tunable narrow-linewidth fiber lasers have become high-quality light sources for long-distance optical fiber communication and optical fiber sensing systems. They are used in military, medical and industrial processing There are also broad application prospects in other fields. [0003] The key to realizing narrow-band laser output is to realize narrow-band mode selection in the all-fiber laser resonator through reasonable cavity structure design and filtering technology. At present, narrowband laser output can be obtained through centimeter-scale linear short cavities and ring cavities with built-in narrowband fiber filters (ie, fiber gratings, sat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/083
Inventor 万洪丹
Owner NANJING UNIV OF POSTS & TELECOMM
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