Acoustic optical Q-regulating method for two-clad optical-fiber laser and apparatus |
Title: |
Acoustic optical Q-regulating method for two-clad optical-fiber laser and apparatus |
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Application Number: |
200510056766 |
Application Date: |
2005/03/25 |
Announcement Date: |
2005/12/21 |
Pub. Date: |
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Publication Number: |
1710482 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
G02F 1/33, H01S 3/00 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Chen Gang, Gong Mali, Huang Lei, Li Chen, Liu Qiang, Yan Ping, Ye Changgeng, Zhang Haitao |
Key Words: |
two-clad, optical-fiber laser, acoustic optical, Q-regulating, method, apparatus |
Abstract: |
In the method, quartz optical fiber of doubly coated fiber laser is as acoustooptic medium directly. Stationary field of sound wave or traveling wave field is formed in the medium so as to form phase grating. Deflection of transmitting direction of oscillated laser occurred caused by diffraction under effect of the phase grating is as a leaking wave. The leaking wave prevents forming oscillated laser. Thus, laser of optical fiber is in state of low Q value. When traveling wave field is disappeared, laser is in state of high Q value. The device includes a radio frequency excited ultrasonic transducer, medium for sound propagation, sound reflection interface or body of sound absorption. The medium for sound propagation is placed between the said transducer and the said interface or body of sound absorption. The doubly coated fiber is in medium for sound propagation. Advantages are: acoustooptic Q switch is realized in coated fiber directly so as to lower insertion loss. |
Claim: |
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Priority: |
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