Coherent light generators – Particular beam control device – Q-switch
Patent
1994-11-30
1996-10-22
Bovernick, Rodney B.
Coherent light generators
Particular beam control device
Q-switch
372703, 359227, 359886, H01S 310
Patent
active
055684963
ABSTRACT:
A broadband thermal optical limiter disposed between a laser oscillator and laser amplifier system for protecting optical components in the laser oscillator from damage due to amplified optical feedback from the laser amplifier system at all near ultraviolet, visible and near infrared wavelengths is disclosed. The thermal optical limiter comprises: a first lens for focusing the amplified optical feedback to a focal point on an optical axis; a flowing dye cell disposed near the focal point and being responsive to the focused amplified optical feedback for thermally defocusing and aberrating the focused amplified optical feedback into a plurality of rings about the optical axis; a second lens for passing only a small portion of the defocused amplified optical feedback; and a blocking aperture disposed around the second lens for blocking substantially all of the thermally defocused amplified optical feedback from the flowing dye cell and passing therethrough into the second lens only a small portion of the thermally defocused amplified optical feedback from the flowing dye cell.
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U.S. patent application Ser. No. 08/251,146 B. L. Justus et al.
Campillo Anthony J.
Huston Alan L.
Justus Brian L.
Merritt Charles D.
Bovernick Rodney B.
Jameson George
McDonnell Thomas E.
Song Yisun
The United States of America as represented by the Secretary of
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