Optical fiber coupler achieving scattered coupling and application thereof

A fiber coupler and fiber combiner technology, which is applied in the coupling, light guide, optics and other directions of optical waveguides, can solve the problems of reduced waveguide conditions, scattering, reflection and mode crosstalk, heat accumulation, etc., to reduce return loss. and mode crosstalk, preventing damage and destruction, eliminating the effect of crosstalk

Inactive Publication Date: 2016-07-13
WUHU ANRUI LASER TECH CO LTD
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scattering, reflections, and mode crosstalk can occur at this point
2 After the pump light enters the inner cladding of the active fiber, it crosstalks with the signal light. After passing through the reflection point, the reflected light of the signal light enters the optical path of the pump light, and thus enters the inside of the pump semiconductor laser, thus Will cause the pump laser to work unstable, damaged, or burned
This is extremely detrimental to the work of fiber lasers and fiber amplifiers
3. The optical power density of the optical fiber combiner at the beam combining point and the bifurcation connection is high, and the heat accumulates. Long-term work is easy to cause heat, which causes the waveguide waveguide to change, thereby reducing or even destroying the optical fiber combiner. work performance

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical fiber coupler achieving scattered coupling and application thereof
  • Optical fiber coupler achieving scattered coupling and application thereof
  • Optical fiber coupler achieving scattered coupling and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like image 3 Shown is a schematic structural diagram of the first fiber laser using the fiber coupler of the present invention. A fiber laser uses 6 independent semiconductor pump lasers 505, which are combined into one bundle through a 6x1 fiber combiner 504, and then enter the port 102 of the second optical fiber 202 of the fiber coupler 501 of the present invention. The first optical fiber 201 is an active optical fiber with an inner cladding 402 and a core 401, the core portion of which is doped with a rare earth element at a relatively low concentration. The first optical fiber 201 is engraved with fiber gratings on both sides of the coupling part as light reflectors 502 and 503, which constitute a laser resonator of the desired wavelength. The pump laser light is weakly coupled per unit length through the fiber coupler of the present invention, and the pump laser light in the optical fiber 202 is coupled into the inner cladding of the optical fiber 201 . The in...

Embodiment 2

[0023] like Figure 4 As shown, it is a schematic structural diagram of the second fiber laser using the fiber coupler of the present invention. A semiconductor laser is used as the seed light source 508, and the pulsed laser output from it is pre-amplified through the pre-optical amplifier 510, and then enters the port 101 of the first optical fiber of the fiber coupler of the present invention. A cladding optical power stripper for double-clad fiber is already included inside the preamplifier. The pumping source uses 6 independent semiconductor pumping lasers 505, which are combined into one bundle through a 6x1 fiber combiner 504, and then enter the port 2 of the second optical fiber of the fiber coupler 501 of the present invention. The first optical fiber 201 is an active optical fiber with an inner cladding 402 and a core 401, the core portion of which is doped with a rare earth element at a relatively low concentration. The first optical fiber 201 does not require fib...

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

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Horizontal spacingaaaaaaaaaa
Login to view more

Abstract

The invention discloses an optical fiber coupler achieving scattered coupling.The optical fiber coupler comprises two optical fibers (201,202), a coupling area and four terminals (101,102,103,104); the two optical fibers (201,202) are arranged in parallel at equal distance, share common outer cladding (301) and are weakly coupled in the outer cladding (301) to form the coupling area, and the four terminals (101,102,103,104) are arranged outside the outer cladding (301).The optical fiber coupler is characterized in that the length of the coupling area ranges from 2 meters to 20 meters, and the transverse spacing distance between the centers of the two optical fibers ranges from 100 micrometers to 500 micrometers.According to the optical fiber coupler, a traditional means that pumping laser is coupled to inner cladding of an active double-cladding optical fiber through an optical fiber beam combiner is abandoned, and the properties of an optical fiber laser are significantly improved.

Description

technical field [0001] The present invention relates to an optical fiber coupler, in particular to a dispersedly coupled optical fiber coupler and its application Background technique [0002] We know that fiber lasers have developed rapidly in recent years. Its types include fiber-optic pulsed lasers, optical fibers in the inner cladding of active optical fibers for optical amplification. [0003] The current method of coupling the pump laser light into the inner cladding of the active fiber is to use a fiber combiner, which is divided into two types: Nx1 and N+1x1. The former couples N beams of pump light into the inner cladding of the active fiber; the latter couples N beams of pump light into the inner cladding of the active fiber while keeping the signal light transmission of the central core unchanged. In actual use, the effect obviously deviates from the ideal situation. These unideal situations include: 1. The signal light is not completely unaffected, but a discon...

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
no application Login to view more
IPC IPC(8): G02B6/26G02B6/42
CPCG02B6/26G02B6/4204G02B6/4296
Inventor 黄伟李丰张巍巍
Owner WUHU ANRUI LASER TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products