Invention Grant
- Patent Title: Attenuator for high-power unpolarized laser beams
- Patent Title (中): 用于大功率非偏振激光束的衰减器
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Application No.: US11803271Application Date: 2007-05-14
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Publication No.: US07706069B2Publication Date: 2010-04-27
- Inventor: Oliver Mehl , R. Russel Austin
- Applicant: Oliver Mehl , R. Russel Austin
- Applicant Address: US CA Santa Clara
- Assignee: Coherent, Inc.
- Current Assignee: Coherent, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Morrison & Foerster LLP
- Main IPC: G02B27/28
- IPC: G02B27/28

Abstract:
Apparatus for attenuating an unpolarized laser beam includes a polarizing beamsplitter for separating the laser beam into two plane-polarized beams following separate paths. The two plane-polarized beams are polarization rotated by a single polarization rotator. Each of the polarization-rotated beams is separated by a polarizing beam-combiner into two plane-polarized portions. One of the portions of one polarization-rotated beam is combined by the beam-combiner with one of the portions of the other polarization-rotated beam to provide an attenuated output-beam. In certain examples of the apparatus the separate paths are made equal in length so that combined beam portions are equal in diameter.
Public/Granted literature
- US20080285130A1 Attenuator for high-power unpolarized laser beams Public/Granted day:2008-11-20
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