Bistable Tm,Ho:YLE laser with bistable zone and adjustable width -

A laser and width technology, applied in the field of devices in the field of laser technology, can solve the problems of increased pump power threshold and high laser loss, and achieve the effects of large adjustment range, low cost and simple structure

Inactive Publication Date: 2009-06-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the reabsorption of the ground state in the non-population inversion region of the laser crystal (the absorption region for 2 μm photons), the laser is in a high-loss state. Therefore, with the increase of the pump power, the particle number

Method used

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  • Bistable Tm,Ho:YLE laser with bistable zone and adjustable width -
  • Bistable Tm,Ho:YLE laser with bistable zone and adjustable width -
  • Bistable Tm,Ho:YLE laser with bistable zone and adjustable width -

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Embodiment Construction

[0020] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0021] to combine figure 1 , this implementation includes: laser diode first pumping source 1, optical fiber 2, coupling lens 3, rear cavity mirror 4, cutting thulium holmium co-doped ytterbium lithium fluoride Tm along the a-axis, Ho: YLF crystal 5, 45° angle plane Folding mirror 6, output mirror 7, coupling lens 8, optical fiber 9, second pumping source 10 of laser diode. The pump light emitted by the two laser diode pumping sources 1, 10 enters the resonant cavity through optical fibers 2, 9 and coupling lenses 3, 8 respectively; 6 and the output mirror 7 is an L-shaped right-angle folded cavity, the front end is the rear cavity mirror 4, the rear end is a 45° angle plane mirror 6, and the lower end is the output mirror 7, and a thulium-holmium co-doped ytterbium lithium fluoride crystal is placed in the resonant cavity 5.

[0022] The output wavelength of t...

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Abstract

The invention provides an optical bistable Tm, Ho:YLF laser, the width of pumping bistable area of a laser diode end surface of which can be adjusted; the optical bistable Tm, Ho:YLF laser comprises a laser diode pumping source, an optical fiber, a coupling lens, a resonant cavity and a thulium and holmium codoping lithium yttrium fluoride crystal; the optical bistable Tm, Ho:YLF laser is characterized in that: pumping light given off by the two laser diode pumping sources enters in the resonant cavity by respectively passing through the optical fiber and the coupling lens; the resonant cavity is an L-shaped right-angle folding cavity which is composed of a back-cavity mirror, a 45 degrees plane folding mirror and an output mirror; the front end of the resonant cavity is the back-cavity mirror, the rear end thereof is the 45 degrees plane folding mirror, and the lower end thereof is the output mirror; the thulium and holmium codoping lithium yttrium fluoride crystal is arranged in the resonant cavity. The laser has small volume, simple structure and low cost; by injecting pumping light to an absorption area, the absorption performance of the absorption area is changed, thus achieving the purpose of adjusting the width of the bistable area and leading the laser to have large adjusting magnitude and convenient usage.

Description

(1) Technical field [0001] The invention relates to a device in the field of laser technology, in particular to an optical bistable Tm, Ho:YLF laser with an adjustable width of a laser diode end-pumped bistable region. (2) Background technology [0002] Optical bistability is a new nonlinear optical phenomenon discovered 15 years after the creation of laser light. Laser bistability refers to two stable output powers corresponding to the same pump power, which output power depends on the way the pump power reaches the corresponding point (whether it increases to this value or decreases to this value). Laser optical bistability has important applications in the fields of optical logic devices, optical switches, optical communications, and optical storage. The method of generating laser bistability is generally to add a dispersive medium or a saturable absorber in addition to the gain medium in the laser resonator, resulting in a complex structure of the laser, and it is diffi...

Claims

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Application Information

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IPC IPC(8): H01S3/10H01S3/0941H01S3/08H01S3/042
Inventor 张新陆崔金辉李立
Owner HARBIN ENG UNIV
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