A Single Frequency, Single Polarization Fiber Distributed Feedback Laser
A fiber distributed and distributed feedback technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of low polarization state purity and unstable output power, and achieve stable power, high practicability, The effect of long coherence length
Active Publication Date: 2022-02-25
XUZHOU NORMAL UNIVERSITY
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Purpose of the invention: Aiming at the problem that the polarization state of the output laser of the existing single-frequency narrow-linewidth fiber distributed feedback laser is not high, which leads to unstable output power, the present invention proposes a single-frequency, single-polarized fiber distributed feedback laser. feedback laser
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0034] refer to figure 1 , the present embodiment provides a single frequency, single polarization fiber distributed feedback laser, the single frequency, single polarization fiber distributed feedback laser includes a photonic crystal fiber DFB grating 1, a wavelength division multiplexer 2, a pump Source 3, fiber optic isolator 4, fiber optic coupler 5 and photodetector 6, wherein each part is connected by fiber optic fusion into such as figure 1 A single-frequency, single-polarization fiber distributed feedback laser is shown.
[0035] In this embodiment, both sides of the photonic crystal fiber DFB grating 1 are connected with a wavelength division multiplexer 2 through optical fiber fusion. Specifically, the other side of the wavelength division multiplexer 2 located on one side of the photonic crystal fiber DFB grating 1 is fused to the pump source 3 and the fiber coupler 5 through the fiber, and the other side of the fiber coupler 5 is fused to the fiber isolator 4 thr...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| length | aaaaa | aaaaa |
| wavelength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a single-frequency, single-polarization optical fiber distributed feedback laser. Both sides of the photonic crystal fiber DFB grating are welded with a wavelength division multiplexer through optical fiber; the wavelength division multiplexer on one side is connected through optical fiber Fusion pump source and fiber coupler, the other side of the fiber coupler is fused to the fiber isolator and photodetector through the fiber, the other side of the fiber isolator is connected to the reverse output laser signal port; the wavelength division multiplexer on the other side The other side is fused with the residual pump and the fiber isolator through the optical fiber, and the other side of the fiber isolator is connected to the forward output laser signal port. The present invention is composed of a single distributed feedback fiber grating with π phase shift, so that the volume of the fiber distributed feedback laser is small, and its output laser is a narrow linewidth light source with single transverse mode and single polarization, which not only has good monochromaticity , The coherence length is long, and the output power is stable, which is less affected by environmental temperature changes, vibration, bending and other factors, and has high practicability.
Description
technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a single-frequency, single-polarization fiber distributed feedback laser. Background technique [0002] The fiber distributed feedback (DFB) laser resonator is composed of a single DFB fiber Bragg grating (FBG) with a π phase shift uniformly distributed in the gain medium. The function of the π phase shift is to form a unique narrow linewidth in the stop band of the DFB grating The transmission window suppresses the high-order resonant longitudinal mode, thereby selectively achieving single-frequency narrow-linewidth laser output at the frequency of the transmission window. Fiber DFB lasers have the characteristics of high output beam quality, single-mode, single-frequency narrow linewidth, stable frequency, low noise, small size, etc., and have broad application prospects in the fields of optical fiber communication, sensing, remote sensing, and medical treatment. Since th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/08
CPCH01S3/067H01S3/0675H01S3/08045
Inventor 施进丹冯宪
Owner XUZHOU NORMAL UNIVERSITY