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555-nanometer laser all-solid-state laser

A laser, all-solid-state technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of complex devices and low output power, and achieve the effect of compact structure and cost reduction

Inactive Publication Date: 2011-09-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the pitfalls and deficiencies in the prior art, the present invention proposes a 555nm laser all-solid-state laser, which uses Nd:GGG crystal as the laser medium to directly generate 1110nm laser, and can generate 555nm laser through frequency doubling crystal , to solve the problem of low output power and complex device

Method used

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Embodiment 1

[0022] Embodiment 1 of the present invention such as figure 1 As shown, it includes pump source, coupling lens group, laser crystal, Q-switching device, frequency doubling crystal, input mirror M1, output mirror M3, coupling mirror M2 and temperature control system. The pump source is located in front of the coupling lens group, and the coupling lens After the group, the coupling cavity is composed of the input mirror M1 and the output mirror M3. The coupling mirror M2 is placed in the coupling cavity, and the coupling cavity is divided into a front cavity and a rear cavity. The laser crystal and Q-switching device are placed in the front cavity in sequence; Frequency crystals; all placed in the temperature control system to keep the temperature of the above crystals and devices constant. It is characterized in that the laser crystals use Nd:GGG crystals, and their end faces are coated with 99% light transmittance for 1060nm, 1110nm and 555nm wavelengths. The input mirror M1 i...

Embodiment 2

[0029] like figure 1 As shown, it includes pumping source, coupling lens group, laser crystal, Q-switching device, frequency doubling crystal, input mirror M1, output mirror M3 and temperature control system. The pumping source is located before the coupling lens group, and the input The mirror M1 and the output mirror M3 constitute a coupling cavity, and the coupling mirror M2 is placed in the coupling cavity, which divides the coupling cavity into a front cavity and a rear cavity, and a laser crystal and a Q-switching device are placed in the front cavity in turn; a frequency doubling crystal is placed in the rear cavity; Placed in a temperature control system to keep the temperature of the above-mentioned crystal and device constant, it is characterized in that the laser crystal adopts Nd:GGG crystal, and its end face is coated with a dielectric film with a light transmittance of 99% to 1060nm, 1110nm and 555nm wavelengths; The input mirror M1 is coated with a dielectric fi...

Embodiment 3

[0036] Same as Embodiment 1, except that the input mirror M1 is a convex mirror with a radius of curvature of +1000mm, and the output mirror M3 is a plane mirror. The Q-switching device is Cr 4+ : YAG crystal, the thickness is 2mm, the small signal transmittance is 60%. The frequency doubling crystal is a KTP crystal with a length of 10 mm.

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Abstract

The invention discloses a 555-nanometer laser all-solid-state laser, belonging to the technical field of solid lasers. The laser comprises a pumping source, a coupled lens group, a coupled cavity and the like, wherein a laser crystal, a Q-switched device and a doubling frequency crystal are arranged in the coupled cavity; and the temperatures of the crystals and the device are kept constant by a temperature control system. The laser is characterized in that: a new wavelength is produced by using a specific gain spectrum line of a Nd:GGG (Gadolinium Gallium Garnet doped with Neodymium) crystal; and medium films which have transmission rates or reflection rates of not less than 99 percent on light of corresponding wavelengths are coated on the end faces of an input lens M1, an endoscopy M2, an output lens M3, the laser crystal and the doubling frequency crystal respectively. The laser has a compact and reliable frame and large output power which can be up to dozens of watts. The laser generates 555-anometer laser light which is most sensitive to human eyes, has wide and important application in the fields of laser display, construction and military affairs, and can be applied in the fields of biology, medicines, astronomy and the like.

Description

technical field [0001] The invention relates to a 555nm laser all-solid-state laser, belonging to the technical field of solid-state lasers. Background technique [0002] Lasers with a wavelength of 555nm have many important applications. First of all, 555nm is the most sensitive wavelength of the human eye, so it can be used for dazzling weapons in military applications, and it can also be used in laser alignment, laser marking, laser pointer, laser display and other fields in construction. Since 555nm has high detection sensitivity for some fluorescent proteins and is also the absorption peak of reduced hemoglobin, it also has important applications in biological and medical detection, diagnosis and treatment. [0003] In the existing reports, limited by the fixed energy level distribution in the all-solid-state laser, there are mainly two ways for the all-solid-state laser to generate 555nm laser: frequency combination and Raman frequency shift. Literature (Lu Yanfei et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/109
Inventor 范书振王青圃张行愚张晓磊刘兆军陈晓寒陶绪堂
Owner SHANDONG UNIV
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