Fiber coupling efficiency of diode lasers

Patent metadata

Field	Value
Publication number	US-2016268762-A1
Application number	US-201414649587-A
Country	US
Kind code	A1
Filing date	Oct 2, 2014
Priority date	Oct 4, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

A system and method for increasing the fiber coupling efficiency of diode lasers is disclosed. The diode laser has a diode pump source for generating a force to pump a laser and a double clad fiber directly coupled to the diode pump source instead of coupling to the multimode fiber. The pumped laser is transmitted directly through the double clad fiber thereby increasing the coupling efficiency of the diode pump source. At least one connector is utilized for connecting the double clad fiber and the diode pump source. The connector has at least one adhesive placed in contact with an acrylate coating and not in contact with a glass cladding of the double clad fiber to avoid cladding stripper and fiber splice thereby increasing the fiber coupling efficiency.

First claim

What is claimed is:

1 . A diode laser comprising:
a diode pump source for generating a force to pump a laser; and a double clad fiber directly coupled to the diode pump source instead of coupling to the multimode fiber, wherein the pumped laser is transmitted directly through the double clad fiber, thereby increasing the coupling efficiency of the diode pump source.

2 . The diode laser of claim 1 further comprises at least one connector for connecting the double clad fiber and the diode pump source.

3 . The diode laser of claim 2 , wherein the connector comprises at least one adhesive in contact with an acrylate coating of the double clad fiber.

4 . The diode laser of claim 3 , wherein the adhesive is not in contact with a glass cladding of the double clad fiber.

5 . The diode laser of claim 3 , wherein the adhesive does not act as a cladding stripper.

6 . The diode laser of claim 1 , wherein the double clad fiber comprises no cladding stripper.

7 . The diode laser of claim 1 , wherein the double clad fiber comprises no then mal management system for the cladding strippers.

B. The diode laser of claim 1 , wherein the double clad fiber comprises high-reflector fiber Bragg grating.

9 . A fiber laser oscillator comprising a diode laser, therein the diode laser comprises:
a diode pump source for generating a force to pump a laser; and a double clad fiber directly coupled to the diode pump source instead of coupling to the multimode fiber, wherein the pumped laser is transmitted through the double clad fiber, thereby increasing the coupling efficiency of the diode pump source.

10 . The fiber laser oscillator of claim 9 , wherein the double clad fiber comprises high-reflector fiber Bragg grating.

11 . A laser system comprising a diode laser, wherein the diode laser comprises:
a diode pump source for generating a force to pump a laser; and a double clad fiber directly coupled to the diode pump source instead of coupling to the multimode fiber, wherein the pumped laser is transmitted through the double clad fiber, thereby increasing the coupling efficiency of the diode pump source.

12 . A method for constructing a double clad fiber comprising:
placing at least one adhesive in contact with an acrylate coating; and avoiding at least one adhesive in contact with a glass cladding.

13 . The method of claim 12 further comprising:
avoiding cladding strippers due to adhesive in contact with the glass cladding; and
avoiding thermal management system for the cladding strippers.

14 . The method of claim 12 further comprising eliminating at least one fiber splice in the double clad fiber.

15 . A method for eliminating a fiber splice in a pump diode comprising:
placing at least one adhesive in contact with an acrylate coating; and coupling a double clad fiber directly to the pump diode.

18 . The method of claim 15 further comprising:
avoiding at least one adhesive in contact with glass cladding;
avoiding cladding strippers by placing adhesive in contact with the glass cladding; and
avoiding thermal management system for the cladding strippers.

Assignees

• Bae Sys Inf & Elect Sys Integ

Inventors

• Johnson Benjamin R
• Creeden Daniel J

Classifications

• H01S3/06733

  Fibre having more than one cladding · CPC title

• H01S3/094003

  the pumped medium being a fibre · CPC title

• H01S3/094007

  Cladding pumping, i.e. pump light propagating in a clad surrounding the active core · CPC title

• H01S3/0675

  Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers · CPC title

• H01S3/09415 Primary

  the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping · CPC title