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Novel microchip laser supporting optical fiber output

A microchip laser and optical fiber technology, applied in the field of laser technology and nonlinear optics, can solve the problems affecting operation and application, difficult beam, beam divergence, etc., to reduce the size of the laser, make it easier to collect and monitor, and increase the structural stability. Effect

Active Publication Date: 2015-07-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that the beam quality of microchip lasers is generally poor. After a certain distance in space transmission, the beam divergence is serious, which affects the actual operation and application, and it is difficult to realize long-distance operation. rely on complex optics

Method used

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  • Novel microchip laser supporting optical fiber output
  • Novel microchip laser supporting optical fiber output
  • Novel microchip laser supporting optical fiber output

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A microchip laser structure capable of fiber output such as figure 1 shown. Figure 601 is the pump source, which can be selected as a semiconductor laser diode with a center wavelength of 976nm and fiber-coupled output; 602 is an optical fiber output system, including an isolator 1 and two wavelength division multiplexing fiber couplers 2. The isolator is to prevent feedback The light affects and damages the pump source, and the wavelength division multiplexing fiber coupler is used for the output of the laser; 603 is an optical collimation system, including two lenses, which collimate and focus the beam; 401 and 402 are coated optical components, The front optical element 401 is coated with an anti-reflection optical film for pump light and a partially reflective optical film for laser light, and the rear optical element 402 is coated with an optical film for total reflection of laser light; 301 is a Yb:GdCOB crystal; the optical elements 401 and 402 are composed of T...

Embodiment 2

[0031] A microchip laser structure capable of fiber output such as figure 2 shown. Figure 601 is the pump source, which can be selected as a semiconductor laser diode with a center wavelength of 976nm and fiber-coupled output; 602 is an optical fiber output system, including an isolator 1 and two wavelength division multiplexing fiber couplers 2. The isolator is to prevent feedback The light will affect and damage the pump source, and the wavelength division multiplexing fiber coupler is used for the output of the laser; 603 is the optical collimation system, which uses a lens to realize the collimation and focusing of the beam; 401 and 402 are the coated optical components, and the front The optical element 401 is coated with an anti-reflection optical film for the pump light and a partially reflective optical film for the laser, and the rear optical element 402 is coated with a total reflection optical film for the laser; 301 is a Yb:GdCOB crystal; the optical elements 401 ...

Embodiment 3

[0034] A microchip laser structure capable of fiber output such as image 3 shown. Figure 601 is the pump source, which can be selected as a semiconductor laser diode with a center wavelength of 976nm and fiber-coupled output; 602 is an optical fiber output system, including an isolator 1 and two wavelength division multiplexing fiber couplers 2. The isolator is to prevent feedback The light will affect and damage the pump source, and the wavelength division multiplexing fiber coupler is used for the output of the laser; 603 is the optical collimation system, which uses the Grin prism to be close to the pump incident end face; 401 and 402 are the coated optical components, the front The optical element 401 is coated with an anti-reflection optical film for the pump light and a partially reflective optical film for the laser, and the rear optical element 402 is coated with a total reflection optical film for the laser; 301 is a Yb:GdCOB crystal; the optical elements 401 and 402...

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Abstract

The invention discloses a novel microchip laser supporting optical fiber output, which belongs to the fields of laser technology and non-linear optics. The novel microchip laser mainly comprises a laser diode pumping source, an optical fiber output system, an optical collimation system, a laser light gain medium and optical elements, wherein pump light enters the optical collimation system for collimating after passing through the optical fiber output system, and is focused onto the gain medium; the film-plated optical elements are arranged in front of and behind the gain medium; the gain medium and the film-plated optical elements in front of and behind the gain medium construct a laser resonant cavity with a sandwich structure; laser light generated by the laser resonant cavity returns along the incident direction of the pump light, passes through the optical collimation system once again, and is output through the optical fiber output system. The novel microchip laser has the characteristics that optical fiber output is performed during the use of an optical fiber pump without any additional output device in a sandwich microchip structure, and a fiber-core pump or a cladding pump can be adopted, so that the flexibility of a system is improved greatly; and meanwhile, the structure can also be applied to pulse modulation of materials such as semiconductor saturable absorbing mirrors, single-wall carbon nanotubes or graphene and the like, and stable pulse output is realized.

Description

technical field [0001] The invention discloses a microchip laser capable of optical fiber output, which belongs to the field of laser technology and nonlinear optics. Background technique [0002] The concept of microchip laser was first proposed by J.J.Zayhowski and Mooradian of Lincoln National Laboratory in 1989. A microchip laser refers to an end-pumped laser device with a microcavity structure whose resonator length is on the order of mm. In a typical microchip laser, the dielectric film is directly coated on the two-pass optical surface of the gain medium to form a micro-resonator. Since the gain medium is mostly below 1mm, it is easy to obtain single-frequency laser output. This laser is characterized by small size, compact structure and stable operation. This kind of laser can operate under continuous or pulsed conditions, and can use active Q-switching or passive Q-switching mechanism to obtain pulse output, and can also use gain switching mechanism to obtain gai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/06H01S3/08H01S3/091H01S3/02H01S3/16H01S3/00
Inventor 王璞金东臣
Owner BEIJING UNIV OF TECH