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38 条记录 (耗时 0.013 秒)

    Optical system for a laser
    31.
    发明公开
    Optical system for a laser 失效
    激光光学系统

    公开(公告)号：EP0100242A3

    公开(公告)日：1986-02-19

    申请号：EP83304369

    申请日：1983-07-28

    申请人： XEROX CORPORATION

    发明人： Scifres, Donald R. ,  Sprague, Robert A.

    IPC分类号： G02B13/00 ,  H01S03/00

    CPC分类号： G02B27/09 ,  G02B19/0014 ,  G02B19/0052 ,  G02B27/0966

    摘要： An optical system for collimating the radiation from a semiconductor laser (70), the laser near field having a single beam waist position in a first direction and having an elongated but phase-coherent near field emitting pattern in a second direction which forms a far field low-divergence beam pattern, the optical system characterized by a lens system for imaging said near field of said single beam waist position in the first spatial direction while imaging the elongated, phase-coherent far field radiation pattern in the second direction. The laser is a multi-emitter or broad emitter semiconductor laser capable of producing one or more output beams. The lens system may include focusing optics to focus radiation in the near field pattern emitted from the laser in the first direction and in the far field pattern of radiation emitted from the laser in the second direction.

    Light source for optic communication system
    32.
    发明公开
    Light source for optic communication system 失效
    光源，用于光学通信系统。

    公开(公告)号：EP0112076A2

    公开(公告)日：1984-06-27

    申请号：EP83307153.3

    申请日：1983-11-23

    申请人： XEROX CORPORATION

    发明人： Scifres, Donald R. ,  Rawson, Eric G.

    IPC分类号： H01S3/23 ,  G02B7/26 ,  H04B9/00

    CPC分类号： H04B10/2507 ,  G02B6/2808 ,  G02B6/425 ,  H01S5/4025 ,  H01S5/4031 ,  H01S5/4056

    摘要： A multi-emitter extended source solid state laser (2) designed to emit light beams at multiple wavelengths within a narrow total spectral bandwidth, that is, a relatively incoherent composite output beam of narrow total spectral bandwidth, is used as the input to a multimode optical fiber (4) of an optic communications link or network. By providing an incoherent composite laser beam input to the fiber, modal noise due to coherence effects is virtually eliminated, so that such effects no loriger affect network performance. In addition, because the source is extended, a more uniform illumination of the fiber face is achieved. An exemplary multi-emitter laser would consist of an array of simultaneously driven emitting regions or cavities which operate in multiple longitudinal modes.

    Optical cursor control device
    34.
    发明公开
    Optical cursor control device 失效
    光学光标控制装置

    公开(公告)号：EP0081348A3

    公开(公告)日：1984-02-01

    申请号：EP82306436

    申请日：1982-12-03

    申请人： XEROX CORPORATION

    发明人： Sprague, Robert A. ,  Scifres, Donald R.

    IPC分类号： G06K11/06

    CPC分类号： G06F3/0317 ,  G06F3/03543

    摘要： An optical cursor control device or "optical mouse" (10) is disclosed for use with an interactive, display oriented computer system to provide movement for a visible cursor from position to position on a display screen of such a system. The cursor control device (10) provides an output indicative of the amount and direction of movement of the device relative to an orthogonal coordiante system. The device relies on a planar grid pattern (18) comprising orthogonally positioned grid lines (19) of uniform spacing, one line (19) and spacing (20) defining a grid period Means (12) is provided to illuminate at least a portion of the grid pattern. Sensor array means (14, 16) comprising optical transducers are provided for each orthogonal direction. Each optical transducer (14, 16) has an elongated radiation detecting area (15,17) to receive radiation from an elongated radiation collecting area (22) at the plane of said grid pattern (18). The length of the radiation collecting area of each transducer is equal to or greater than a grid period and the width of these areas is equal to or narrower than the width of one half of the grid period.

    Injection lasers
    36.
    发明公开
    Injection lasers 失效
    注射激光。

    公开(公告)号：EP0067588A1

    公开(公告)日：1982-12-22

    申请号：EP82302742.0

    申请日：1982-05-27

    申请人： XEROX CORPORATION

    发明人： Burnham, Robert D. ,  Scifres, Donald R. ,  Streifer, William

    IPC分类号： H01S3/19

    CPC分类号： H01S5/20 ,  H01S5/2059 ,  H01S5/2232 ,  H01S5/2234 ,  H01S5/2235 ,  H01S5/2237 ,  H01S5/24

    摘要： In a semiconductor injection laser with a nonplanar surface pattern on the substrate, growth of the plurality of layers comprising the laser structure is accomplished in vapor phase epitaxy to produce a lateral spatial thickness variation (LSTV) in the active region of the laser. The LSTV profile is one producing an effective, although small, lateral retractive index variation in the active region, thereby permitting the maintenance of the lowest order transverse mode alone the plane of the active region.

    A heterojunction solid state laser
    37.
    发明公开
    A heterojunction solid state laser 失效
    激光半导体异质结构。

    公开(公告)号：EP0020019A1

    公开(公告)日：1980-12-10

    申请号：EP80301343.2

    申请日：1980-04-24

    申请人： XEROX CORPORATION

    发明人： Scifres, Donald R. ,  Streifer, William ,  Burnham, Robert D.

    IPC分类号： H01S3/19

    CPC分类号： H01S5/2232 ,  H01S5/2234

    摘要： A channelled substrate heterojunction semiconductor laser (2) in which transverse and longitudinal mode control is achieved by having the laser current profile flat over the substrate channel. A flat current profile over the substrate channel, which is chieved by having the width of the path of the pump current greater than the width of the can- nel, causes waveguiding to be influenced only by a fixed: channel guiding factor.