发明申请
US20080156877A1 Device for producing a laser beam of reduced coherency using high-frequency modulation of the laser diode current and optical multiplexing of the output laser beam
失效
用于产生激光二极管电流的高频调制和输出激光束的光学多路复用的降低相干性的激光束的装置
- 专利标题： Device for producing a laser beam of reduced coherency using high-frequency modulation of the laser diode current and optical multiplexing of the output laser beam
- 专利标题（中）： 用于产生激光二极管电流的高频调制和输出激光束的光学多路复用的降低相干性的激光束的装置
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申请号： US11980317申请日： 2007-10-30
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公开(公告)号： US20080156877A1公开(公告)日： 2008-07-03
- 发明人: C. Harry Knowles , Xiaoxun Zhu , Timothy Good , Tao Xian , Anatoly Kotlarsky , Michael Veksland , Mark Hernandez , John Gardner , Steven Essinger , Patrick Giordano , Sean Kearney , Mark Schmidt , John A. Furlong , Nicholas Ciarlante , Yong Liu , Jie Ren , Xi Tao , JiBin Liu , Ming Zhuo , Duane Ellis
- 申请人： C. Harry Knowles , Xiaoxun Zhu , Timothy Good , Tao Xian , Anatoly Kotlarsky , Michael Veksland , Mark Hernandez , John Gardner , Steven Essinger , Patrick Giordano , Sean Kearney , Mark Schmidt , John A. Furlong , Nicholas Ciarlante , Yong Liu , Jie Ren , Xi Tao , JiBin Liu , Ming Zhuo , Duane Ellis
- 专利权人： Metrologic Instruments, Inc.
- 当前专利权人： Metrologic Instruments, Inc.
- 主分类号： G06K7/10
- IPC分类号： G06K7/10
摘要：
A laser beam despeckling device including a laser diode for producing a laser beam having a central characteristic wavelength. The device includes diode current drive circuitry for producing a diode drive current to drive said laser diode and produce said laser beam. High frequency modulation (HFM) circuitry modulates the diode drive current at a sufficiently high frequency to cause said laser diode to produce spectral side-band components about the central characteristic wavelength, and reducing the coherence as well as coherence length of the laser beam. An optical beam multiplexing (OMUX) module is provided for receiving the laser beam as input beam, a generating as output, a plurality of laser beam components that are recombined to produce a composite laser beam having substantially reduced coherence for use in illumination applications where a substantial reduction in speckle pattern noise is achieved.
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