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Q adjusting method for steady cavity/unsteady cavity of laser diode end-face pump solid laser

A technology of laser diodes and solid-state lasers, applied in lasers, laser components, phonon exciters, etc., can solve the problems of reducing the conversion efficiency from pump light to output laser, affecting the quality of output laser beam, generating thermal effects and insertion loss, etc.

Inactive Publication Date: 2011-01-12
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the addition of Q-switching components in the resonator, the structure of Q-switched lasers is usually more complex than that of non-Q-switched laser diode end-pumped solid-state lasers, and its existence will cause thermal effects and insertion losses, which affect the quality of the output laser beam. Reduced conversion efficiency of pump light to output laser light

Method used

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  • Q adjusting method for steady cavity/unsteady cavity of laser diode end-face pump solid laser
  • Q adjusting method for steady cavity/unsteady cavity of laser diode end-face pump solid laser
  • Q adjusting method for steady cavity/unsteady cavity of laser diode end-face pump solid laser

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Embodiment 1

[0017] Embodiment 1: as figure 1 As shown, the laser diode end-pumped solid-state laser includes a pump source laser diode 1 , a coupling system 2 , and a laser resonator. The laser resonator includes a laser crystal 4 and an output mirror 5 . The rear end surface of the output mirror 5 is connected with the telescopic surface of the piezoelectric ceramic device 6, and the stretching and wriggling of the piezoelectric ceramic device 6 is controlled by electric signals, and the mirror surface of the output mirror 5 is perpendicular to the optical path. The output beam of the laser diode 1 is injected into the laser crystal 4 in the resonant cavity through the coupling system 2. Due to the high energy of the pump light, a thermal effect is generated inside the laser crystal 4, so that the crystal thermal lens 3 is formed in the resonant cavity. At this time, the crystal thermal lens The focal length of 3 is greater than the length of the resonator, the laser has laser output, an...

Embodiment 2

[0018] Embodiment 2: as figure 2 As shown, the system structure is the same as that of Embodiment 1, the difference is that the electrical signal applied to the piezoelectric ceramic device 6 is as follows figure 2 As shown, when a negative voltage is applied, the thickness of the piezoelectric ceramic device 6 is smaller than the initial state. At this time, the pump power is increased, and the focal length of the crystal thermal lens 3 is shortened. When the focal length is smaller than the cavity length, the resonant cavity is in an unstable state. When the resonant cavity loses a lot, there is no laser output, and the pump light causes the number of energy-level particles on the laser crystal 4 to accumulate and store energy; when a positive voltage is applied, the thickness of the piezoelectric ceramic device 6 is greater than the initial state, driving the output mirror 5 to move at On the path parallel to the optical axis, the cavity length of the resonant cavity is s...

Embodiment 3

[0019] Embodiment 3: as image 3 As shown, the system structure is the same as that of Embodiment 1, the difference is that the electrical signal applied to the piezoelectric ceramic device 6 is as follows image 3 As shown, when a negative voltage is applied, the thickness of the piezoelectric ceramic device 6 is smaller than the initial state. At this time, the pump power is increased, and the focal length of the crystal thermal lens 3 is shortened. When the focal length is smaller than the cavity length, the resonant cavity is in an unstable state. When the resonant cavity loses a lot, there is no laser output, and the pumping light causes the number of energy-level particles on the laser crystal 4 to accumulate and store energy; when the voltage is zero, the thickness of the piezoelectric ceramic device 6 returns to the initial state, driving the output mirror 5 to move at On the path parallel to the optical axis, the cavity length of the resonant cavity is shortened. When...

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Abstract

The present invention relates to a laser diode end-face pump solid laser, especially a Q adjusting method for a steady cavity / unsteady cavity of the laser diode end-face pump solid laser, including atleast a pump source laser diode for forming a laser, a coupling system and a laser resonant cavity, the laser resonant cavity includes a laser crystal and an output mirror and is characterized in that a light output face of the output mirror is fixed with a piezoelectric ceramic device, the telescoping variation of the piezoelectric ceramic device is controlled by electrical signals to drive theoutput mirror to move right and left along an optical axis, when the length of the resonant cavity is smaller than the focal distance of a crystal thermal lens due to the telescoping variation, the laser resonant cavity emits laser, when the length of the resonant cavity is more than the focal distance of the crystal thermal lens due to the telescoping variation, the resonant cavity is in an unsteady state and the attrition of the resonant cavity is larger without laser output. The invention may simplify the structure of a Q adjusting laser, avoid the attrition and other badness effects due tothe insertion of optical elements, and implement a high light-light translation efficiency.

Description

technical field [0001] The invention relates to a laser diode end-pumped solid-state laser, in particular to a stable-cavity-unstable-cavity Q switching method in the laser diode end-pumped solid-state laser. Background technique [0002] Laser diode end-pumped solid-state lasers are usually composed of a pump source laser diode, a coupling system, and a resonant cavity. The resonant cavity includes a laser crystal and a cavity mirror. The laser crystal can convert pump light energy into laser energy. The crystal pump end-face coating As a cavity mirror, the output mirror surface coating acts as another cavity mirror. For laser diode end-pumped solid-state lasers, due to effects such as quantum difference losses, only part of the total injected energy is converted into laser output, and most of the remaining energy is converted into heat dissipation. Due to the joint effect of the uneven distribution of pumping light and the heat dissipation system around the crystal, the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/16H01S3/0941H01S3/11
Inventor 过振宋小鹿王石语蔡德芳文建国李兵斌
Owner XIDIAN UNIV
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