Self Raman multiple frequency complete-solid yellow light laser

Abstract

A self-raman double frequency total solid yellow light laser, includes a laser diode LD pumping source, a resonant cavity consisting of a back cavity mirror and an output mirror, characterized in that, a self-raman crystal, a Q-adjusting device and a double frequency crystal are arranged in the resonant cavity, which are processed with the temperature control by a cooling device. The laser of the invention has smaller volume, higher output power and conversion efficiency than that in the background technology, which can be widely used in the laser medical treatment field with small volume, stable performance and low cost.

Description

(1) Technical field [0001] The invention relates to a solid-state laser, in particular to a self-Raman frequency-multiplied all-solid-state yellow laser. (2) Background technology [0002] Laser technology is one of the major inventions of the 20th century, and it has been widely used in various fields such as industrial production, communication, information processing, medical and health, military affairs, cultural education, and scientific research. With the major breakthroughs in semiconductor laser diode technology, solid-state lasers have been strongly developed, and their application fields have been continuously expanded. The all-solid-state laser pumped by LD is a second-generation new solid-state laser with high efficiency, stability, good beam quality, long life and compact structure. It has become one of the key development directions of laser science. It is used in space communication, optical fiber communication , Atmospheric research, environmental science, m...

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Problems solved by technology

The sum-frequency method has the disadvantages of large volume, low power, poor conversion efficiency, unstable structure, and difficulty in realization; the method of frequency-doubling Raman light is simpler than the method of sum-frequency, but most of the world uses extracavity frequency-doubling Raman light at present. Mann's method (Low threshold, diode end-pumped Nd 3+ :GdVO 4 self-Ramanlaser, "Optical Materials", Vol.29, 2007, 1817-1820) and intracavity frequency-doubling continuous Raman light method (Efficient all-solid-state yellow laser source producing 1.2-W average power, "Optics Letters ", Vol.24, 1999, 1490-1492; All-solid-state 704mW continuous-waveyellow source based on an intracavity, frequency-doubled crystalline Raman laser, "Optics Letters", Vol.32, 2007, 1114-1116)

The method of frequency doubling Raman light outside the cavity is poor in frequency doubling efficiency due to the low power of Raman light outside the cavity, and the output yellow light power is low; while the method of frequency doubling continuous Raman light in the cavity is due to the peak power of the fundamental frequency light Low, the conversion efficiency into Raman light is poor, and high-power yellow light output cannot be obtained

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