Optical parametric oscilaltor with reflectivity-variable cavity |
Title: |
Optical parametric oscilaltor with reflectivity-variable cavity |
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Application Number: |
01130791 |
Application Date: |
2001/08/24 |
Announcement Date: |
2002/02/06 |
Pub. Date: |
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Publication Number: |
1334625 |
Announcement Number: |
1140024 |
Grant Date: |
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Granted Pub. Date: |
2004-2-25 |
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
H01S 3/08, H01S 3/105 |
Applicant(s): |
Qinghua Univ |
Inventor(s): |
Gong Mali, Yan Ping, Shen Lei |
Key Words: |
Optical parametric oscilaltor, reflectivity-variable cavity |
Abstract: |
An optical parametric oscillator with reflectivity varying cavity consists of input reflector, non-linear crystal and output reflector, the non-linear crystal is on the place between the two reflectors. The reflectivity varying film series 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, the films among film series are made of inorganic optical filming materials. Since the values of reflectivity of input or output reflector to outpt light are varied as a curve along the radial, the angle of divergence of beam is diminished effectively, hence the quality of the output laser beam is improved. |
Claim: |
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Priority: |
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PCT: |
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