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    • 31. 发明申请
    • Digital optical sourcing and methods of operating a digital optical source
    • 数字光源和操作数字光源的方法
    • US20030231677A1
    • 2003-12-18
    • US10173056
    • 2002-06-17
    • Alfonso Benjamin AmparanDavid Lee Gines
    • H01S003/10H01S003/00
    • H04B10/541H01S5/0265H01S5/0427H01S5/06209H01S5/06213H04B10/505
    • Digital optical sources and methods of operating the same are described. In one aspect, a digital optical source includes a laser, an optical intensity modulator, and a drive circuit. The laser is operable to generate light of higher output optical power in a high output power mode and to generate light of lower output optical power in a low output power mode. The optical intensity modulator is coupled to receive light from the laser and is operable to intensity modulate the received laser light less in a high output power mode and to intensity modulate the received laser light more in a low output power mode. The drive circuit is coupled to the laser and the optical intensity modulator and is configured so that the laser and the optical intensity modulator are operated synchronously in high output power modes and in low output power modes.
    • 描述了数字光源及其操作方法。 一方面,数字光源包括激光器,光强度调制器和驱动电路。 激光器可操作以在高输出功率模式下产生更高输出光功率的光,并以低输出功率模式产生较低输出光功率的光。 光强度调制器被耦合以接收来自激光器的光,并且可操作以在高输出功率模式下对接收的激光进行强度调制,并且以低输出功率模式更强地调制接收的激光。 驱动电路耦合到激光器和光强度调制器,并且被配置为使得激光器和光强度调制器以高输出功率模式和低输出功率模式同步地操作。
    • 32. 发明申请
    • Tunable optical signal oscillator
    • 可调光信号振荡器
    • US20020146046A1
    • 2002-10-10
    • US10106201
    • 2002-03-27
    • Samsung Electronics Co., Ltd.
    • A-jung KimYoung-kwang Seo
    • H01S003/10
    • H01S5/4006G02F1/3538H01S5/06213H01S5/0623
    • A tunable optical oscillator that generates optical signals at a band of micro- to millimeter-wave is provided. The tunable optical oscillator includes an electrical signal generator for generating an electrical signal at the predetermined band; a master laser that is driven by the electrical signal, and generates an optical signal having a first frequency; and a slave laser that is driven by an electrical signal, injected into the optical signal generated by the master laser, generates an optical signal having a second frequency, and mixes the received optical signal with the optical signal having a second frequency to be output. The tunable optical oscillator is capable of generating signals over a broadband including micro- to millimeter-wave and beyond, say, from tens of MHz to several THz. The generated signals by the optical oscillator have also frequency tunability over the range of tens of GHz with coarse tuning methods to tens of MHz with fine tuning methods.
    • 提供了一种在微毫米波段产生光信号的可调光学振荡器。 可调谐光学振荡器包括用于产生预定频带的电信号的电信号发生器; 由所述电信号驱动的主激光器,并产生具有第一频率的光信号; 以及被注入到由主激光器产生的光信号中的由电信号驱动的从属激光器,产生具有第二频率的光信号,并将接收到的光信号与具有要输出的第二频率的光信号进行混合。 可调谐光学振荡器能够通过包括微米到毫米波在内的宽带产生信号,例如从几十MHz到几个THz。 光学振荡器产生的信号在数十GHz的范围内也具有频率可调谐性,通过微调方法可以用微调方法将其调谐到数十MHz,并具有微调方法。
    • 33. 发明申请
    • SPECKLE SUPPRESSED LASER PROJECTION SYSTEM USING A MULTI-WAVELENGTH DOPPLER SHIFTED BEAM
    • 使用多波长多普勒变焦光束的光束抑制激光投影系统
    • US20020114057A1
    • 2002-08-22
    • US09788978
    • 2001-02-20
    • Eastman Kodak Company
    • James E. RoddyWilliam R. Markis
    • G02F001/23G02F001/11
    • H04N5/74G02F1/116H01S5/06213H01S5/0652H04N5/7416H04N9/3129
    • A system and method for reducing or eliminating the speckle intensity distribution of a laser imaging system. In one embodiment of the invention, a radio frequency signal is injected into a semiconductor laser light source (12) for a projection system (10) to create different speckle patterns that blend together on a projection surface (19). In another embodiment of the invention, optical feedback is used to induce a laser light source for a projection system (10) to create different speckle patterns that blend together on a projection surface (19). In another embodiment of the invention, the laser light source wavelength is Doppler shifted to produce different speckle patterns. In another embodiment of the invention, a means of deflection is used to directionally move the beam to reduce noticeable speckle. Since the eye is very sensitive to horizontal and vertical edges, but less sensitive to angles in between, beam movement of approximately 45 degrees may minimize the loss of MTF in the horizontal and vertical directions.
    • 一种用于减少或消除激光成像系统的斑点强度分布的系统和方法。 在本发明的一个实施例中,将射频信号注入用于投影系统(10)的半导体激光光源(12)中,以在投影表面(19)上产生混合在一起的不同散斑图案。 在本发明的另一个实施例中,光学反馈用于诱导用于投影系统(10)的激光光源,以在投影表面(19)上产生混合在一起的不同散斑图案。 在本发明的另一实施例中,激光光源波长被多普勒偏移以产生不同的散斑图案。 在本发明的另一个实施例中,偏转装置用于定向地移动光束以减少明显的斑点。 由于眼睛对水平和垂直边缘非常敏感,但对角度之间的角度较不敏感,大约45度的光束移动可以使水平和垂直方向上MTF的损失最小化。
    • 34. 发明申请
    • Method for the thermal stabilization of a laser diode in a recorder
    • 记录仪中激光二极管的热稳定方法
    • US20020113858A1
    • 2002-08-22
    • US10034050
    • 2001-12-20
    • Jorg-Achim FischerKlaus-Gunter Leiss
    • B41J002/435B41J002/47
    • B41J2/471H01S5/06213H01S5/06216H01S5/068
    • A laser diode in a recorder is thermally stabilized. The laser diode is used to produce a light beam, which is modulated by superimposing a basic current and a modulation current derived from an image signal, and exposes a recording material point by point and line by line. Between the exposure periods, wherein in each case one line is exposed, there are return periods, wherein the light beam is guided to the start of the next line, and wherein the laser diode is modulated for the purpose of thermal stabilization. In the return period, the laser diode is modulated with the basic current during a stabilization period, the sum of the modulation times during the exposure period and during the stabilization period being constant. In addition, during the return period, the laser diode can be modulated with a modulation current, which is derived from the inverted image signal from the preceding or the following line.
    • 记录仪中的激光二极管是热稳定的。 激光二极管用于产生光束,其通过叠加基本电流和从图像信号导出的调制电流进行调制,并逐点地逐个曝光记录材料。 在曝光期间,其中在每种情况下一条线被暴露,存在返回周期,其中光束被引导到下一行的起点,并且其中激光二极管被调制以达到热稳定的目的。 在返回期间,激光二极管在稳定期间用基本电流进行调制,曝光期间和稳定期间的调制时间之和恒定。 此外,在返回周期期间,激光二极管可以用调制电流进行调制,调制电流是从前一行或后续行的反转图像信号导出的。
    • 35. 发明授权
    • Transmission system using a semiconductor laser and a fiber grating discriminator
    • 传输系统采用半导体激光器和光纤光栅鉴别器
    • US06331991B1
    • 2001-12-18
    • US09354107
    • 1999-07-15
    • Daniel Mahgerefteh
    • Daniel Mahgerefteh
    • H01S310
    • H01S5/06216G02B6/29317H01S5/0057H01S5/06213H01S5/12
    • The optical signal produced by a modulated semiconductor laser is passed through a fiber grating optical discriminator to increase the modulation response of the device and decrease the output chirp for transmission through optical fiber. In one embodiment, a simple pulse source comprises a directly modulated single mode semiconductor laser and a fiber Bragg grating filter. A single-mode semiconductor laser, such as, a distributed feed-back laser is driven by the addition of a DC bias current and a sinusoidal current at the desired bit rate. The output of the laser is passed through a low pass or high pass fiber Bragg grating filter with a sharp edge to produce nearly transform limited pulses. Stabilization of a laser apparatus is included.
    • 由调制的半导体激光器产生的光信号通过光纤光栅鉴别器,以增加器件的调制响应,并减少用于通过光纤传输的输出线性调频脉冲。 在一个实施例中,简单的脉冲源包括直接调制的单模半导体激光器和光纤布拉格光栅滤波器。 单模半导体激光器,例如分布式反馈激光器通过以期望的比特率添加DC偏置电流和正弦电流来驱动。 激光器的输出通过具有尖锐边缘的低通或高通光纤布拉格光栅滤波器,以产生几乎变换的限制脉冲。 包括激光装置的稳定性。
    • 37. 发明授权
    • High-speed CMOS driver for optical sources
    • 用于光源的高速CMOS驱动器
    • US5589786A
    • 1996-12-31
    • US456712
    • 1995-06-01
    • Valter BellaPaolo Pellegrino
    • Valter BellaPaolo Pellegrino
    • H01S5/042H01S5/062H03K3/42
    • H01S5/042H01S5/0427H01S5/06213
    • The circuit in CMOS technology allows high speed driving of optical sources, in particular laser diodes, operating efficiently at speeds that meet the requirements imposed by optical fiber communication systems and avoiding interference between driving currents and biasing current in the optical source. The circuit utilizes a bias current generator, a modulation current generator and a cascade of CMOS inverter stages that supplies a driving voltage to the modulation current generator and receives digital signals at its input. It is possible to independently adjust the bias current, so as to allow driving sources with different threshold currents, and to adjust the modulation current.
    • CMOS技术中的电路允许光源(特别是激光二极管)的高速驱动,能够以满足光纤通信系统所要求的速度的有效运行,并避免驱动电流和光源中的偏置电流之间的干扰。 该电路利用偏置电流发生器,调制电流发生器和级联的CMOS反相器级,向调制电流发生器提供驱动电压并在其输入端接收数字信号。 可以独立地调整偏置电流,以允许具有不同阈值电流的驱动源,并调整调制电流。