Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Active optical fiber and method for fabricating an active optical fiber

A technology of optical fiber and prefabricated parts, applied in the direction of cladding optical fiber, manufacturing tools, optical waveguide and light guide, etc., can solve the problems of pump loss, pump power leakage optical fiber, etc., and achieve the effect of improving absorption

Active Publication Date: 2010-11-10
AMPLICONYX OY
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the obvious disadvantage that due to scattering in the "truncated region" directly embedded in the cladding it will necessarily lead to a significant leakage of the pump power out of the fiber
i.e. the method will result in a pump loss

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
  • Active optical fiber and method for fabricating an active optical fiber
  • Active optical fiber and method for fabricating an active optical fiber
  • Active optical fiber and method for fabricating an active optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Figure 4 A longitudinal section of a tapered portion 11 of a double-clad active fiber according to one embodiment of the invention is shown. This part of the fiber comprises an active core 1 , an inner cladding 2 , and an outer cladding 3 . Also shown is the tapered curve or profile 6 of this portion of the fiber. The conical curve 6 of the outer cladding 3 of the optical fiber exhibits the diameter of the portion 11 of the optical fiber as a function of the position on the portion 11 of the optical fiber. exist Figure 4 In the example of , the conic curves for all three layers above follow a linear functional relationship, although other curves could be utilized. Considering the manufacturing method, an example can be considered where all the layers in this part of the fiber have the same functional dependence of the longitudinal curve. According to the invention, however, only the core 1 and the inner cladding 2 in which the pump power is propagated need to be tap...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A section ofactive optical fiber (11) which comprises an active core (1), an inner cladding layer (2) andan outer cladding layer (3). The diameter of said core (1) and the thickness of said inner cladding (2) change gradually along the length of said section of active optical fiber (11). This formsa tapered longitudinal profile enabling a continuous mode conversion process alongthe length of the section of fiber (11). The method for fabricating a section of tapered active optical fibercomprises the steps of fabricating a preform for drawing active optical fiber from said preform,installing said preform into a drawing tower, drawing optical fiber in said drawing tower and altering at least one of the two parameters including the take-off preform speed and the take-up fiber speed during drawing of the optical fiber.

Description

technical field [0001] The present invention relates to active fibers, fiber amplifiers, and fiber lasers. Background technique [0002] Double-clad active fibers are widely used in fiber lasers and amplifiers. Fiber lasers and amplifiers with CW output powers of several kilowatts have been demonstrated. In addition to the obvious advantages, the known double-clad active fibers have serious drawbacks. [0003] First, there is a limit to the level of pump power that can be launched into a double-clad fiber. This therefore limits the power scaling capabilities of fiber lasers and amplifiers. Furthermore, in single-mode fibers, the fundamental mode propagation requirement imposes a limit on the maximum core diameter. This requirement states that even for fibers with small numerical apertures (NA < 0.07), the core diameter should not exceed 12 μm for an operating wavelength of 1 μm. Meanwhile, since the pump absorption in double-clad fibers depends on the core / cladding d...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067C03B37/027G02B6/036
CPCC03B2203/04C03B2203/02H01S3/06745H01S3/094007C03B2205/44H01S3/06708G02B6/036C03B2203/06C03B37/02763C03B2205/40C03B2203/18C03B2203/32H01S3/094011G02B6/14Y10T29/49982
Inventor Y·沙莫罗夫斯基O·鄂霍汀考夫M·派萨V·菲立波夫
Owner AMPLICONYX OY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com