Optical parametric oscillator with reflectivity-variable internal cavity |
Title： |
| Optical parametric oscillator with reflectivity-variable internal cavity |
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Application Number： |
01130792 |
Application Date： |
2001/08/24 |
Announcement Date： |
2002/02/06 |
Pub. Date： |
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Publication Number： |
1334626 |
Announcement Number： |
1123950 |
Grant Date： |
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Granted Pub. Date： |
2003-10-8 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H01S 3/08, H01S 3/086, H01S 3/105 |
Applicant(s)： |
Qinghua Univ |
Inventor(s)： |
Gong Mali, Yan Ping, Shen Lei |
Key Words： |
Optical parametric oscillator, reflectivity-variable, internal cavity |
Abstract： |
The invention relates to an optical parametric oscillator with reflectivity varying in inner cavity. It consists of pump reflector, laser crystal, middle reflector, non-linear crystal and output reflector. The reflectivity varying film series corresponding to output light wave and composed of at least three films are applied on the surface of a reflector chosen one of them from output or input reflector. The coated surface faces to the crystal. The thickness of at least one film is curvilinear and the thickness at highest point of the curvilinear is as d=1/4n. The films among film series are made of inorganic optical filming materials. The angle of divergence of beam is diminished effectively, the quality of the output laser beam is improved by using cavity mirror whose values of reflectivity is varied as a curve along the radial. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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