End semiconductor pumping bidirectional solid ring laser

An end-pumped, bidirectional solid-state technology, applied in lasers, laser components, phonon exciters, etc., can solve the problems of low efficiency and reliability, achieve low energy loss, overcome high coating requirements, overcome temperature drift and Non-Linear Insufficient Effects

Inactive Publication Date: 2003-08-20
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

However, due to the use of lamp (flash lamp or arc lamp) pumping, the efficiency and reliability are low

Method used

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  • End semiconductor pumping bidirectional solid ring laser
  • End semiconductor pumping bidirectional solid ring laser
  • End semiconductor pumping bidirectional solid ring laser

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Experimental program
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Embodiment

[0021] Embodiment: the structural representation of this system is as figure 1 shown. The detailed steps are as follows: the semiconductor laser array 1 used is a 6W GaAlAs / GaAs double heterojunction laser array with a peak wavelength of 810±5nm, which is fixed on a semiconductor refrigerator and controlled by a temperature control system. The gain medium 7 adopts a crystal whose absorption wavelength matches the peak wavelength of the semiconductor laser. We choose a very mature Nd:YVO 4 , did not choose Nd: YAG. Nd: YVO 4 The doping concentration of the crystal is ≈0.5%, the geometric shape is a slab, the size is 10×5×5mm, the input and output end faces (that is, two 5×5mm faces) are plated with a high-transparency film with a reflectivity of less than 0.1% for the 1064nm wavelength, and the crystal is used The indium foil wrap (for good thermal contact) is placed inside the copper block, which is cooled and temperature controlled by a peltier cooler. The annular cavity ...

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Abstract

The present invention relates to the structure design of semiconductor pumping solid laser. By means of the slit or pinhole between the concave mirror light path and the plane mirror light path or between two plane mirror light paths and the Fabry-Perot interferometer, the present invention limits the size of bi-directional laser beam inside the cavity to make the laser output fundamental transverse mode, and modulate the bi-directional fluorescence inside ring cavity to make different longitudinal mode fluorescence produce different loss, so that the longitudinal mode fluorescence with low loss forms single longitudinal mode laser output. The present invention realize single transverse mode and single longitudinal mode output of bi-directional solid ring laser with simple optical path structure, small single mode energy loss and great output power.

Description

technical field [0001] The invention belongs to the field of semiconductor-pumped solid-state laser technology and sensor technology, in particular to a structural design of a semiconductor end-pumped bidirectional solid-state ring laser operating in a single transverse mode and a single longitudinal mode. Background technique [0002] Semiconductor-pumped solid-state lasers combine the advantages of semiconductor lasers and solid-state lasers. Semiconductor lasers are small in size, light in weight, and can directly inject electrical signals to achieve high quantum efficiency. The composition and temperature can be adjusted to obtain a wavelength that matches the pumping of solid-state laser materials. However, the beam quality of semiconductor lasers is poor, and the transverse mode characteristics are not ideal, so it is difficult to be directly used in an environment that requires high beam quality. In contrast, the output power of solid-state lasers is large, and the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/083H01S3/16
Inventor 田芊孙利群张志利章恩耀万顺平毛献辉
Owner TSINGHUA UNIV
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