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    • 68. 发明授权
    • Excited state atomic line filters
    • 激发态原子线滤波器
    • US07058110B2
    • 2006-06-06
    • US10682567
    • 2003-10-09
    • Zhong-Quan ZhaoMichael Joseph LefebvreDaniel H. Leslie
    • Zhong-Quan ZhaoMichael Joseph LefebvreDaniel H. Leslie
    • H01S3/22
    • H01S3/10H01S3/1303
    • An excited state atomic line filter. The present invention solves the problem of lack of ground state resonant lines in at wavelengths substantially longer than those of visible light. Atomic line filters of the Faraday or Voigt crossed polarizer type are provided in which alkali metal atomic vapor in a vapor cell is excited with a pump beam to an intermediate excited state where a resonant absorption line, at a desired wavelength, is available. A magnetic field is applied to the cell producing a polarization rotation for polarized light at wavelengths near the resonant absorption lines. Thus all light is blocked by the cross polarizers except light near one of the spaced apart resonant lines. However, the polarization of light at certain wavelengths near the resonant is rotated in the cell and therefore passes through the output polarizer.
    • 激态态原子线滤波器。 本发明解决了在基本上长于可见光的波长的波长下缺少基态谐振线路的问题。 提供了法拉第或Voigt正交偏振器类型的原子线滤光器,其中在蒸气室中的碱金属原子蒸汽被泵浦光束激发到中间激发态,其中所需波长的谐振吸收线可用。 向细胞施加磁场,产生在谐振吸收线附近的波长的偏振光的偏振旋转。 因此,所有的光被交叉偏振器阻挡,除了靠近一个间隔开的谐振线之外的光。 然而,谐振附近的特定波长的光的偏振在单元中旋转,因此通过输出偏振器。
    • 69. 发明授权
    • Laser wavelength locker
    • 激光波长更衣柜
    • US07027470B2
    • 2006-04-11
    • US10639241
    • 2003-08-11
    • Randy Dean May
    • Randy Dean May
    • H01S3/10H01S3/13
    • G01J3/02G01J3/0286G01J3/26G01J3/28G01J9/00H01S3/1303H01S5/0014H01S5/0617H01S5/0687H01S5/4087
    • The method and system operate to maintain a widely tunable laser (WTL) at a selected transmission wavelength. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a transmission line for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector to determine the power of the beam. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift attributable to the etalon.
    • 该方法和系统用于维持在选定的透射波长下的广泛可调激光(WTL)。 为了将WTL锁定到国际电联电网线路,来自WTL的输出波束的一部分被路由通过标准具将光束分成传输线,以便由标准具条纹检测器进行检测。 光束的另一部分被直接路由到激光波长检测器以确定光束的功率。 波长锁定控制器比较来自两个检测器的信号,并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准,然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后,波长锁定控制器监测标准具的温度并保持温度恒定,以防止归因于标准具的任何波长漂移。
    • 70. 发明授权
    • Technique for filtering chirp from optical signals
    • 从光信号滤波啁啾的技术
    • US06693928B2
    • 2004-02-17
    • US09966152
    • 2001-09-28
    • Randy Dean May
    • Randy Dean May
    • H01S3098
    • H01S5/0687H01S3/1303H01S5/0617H01S5/4087
    • The method and system operate to calibrate a transmission laser of the dense wavelength division multiplexer (DWDM) and to lock the laser to a selected transmission wavelength. In one example, the transmission laser is a widely tunable laser (WTL) to be tuned to one of a set of International Telecommunications Union (ITU) transmission grid lines for transmission through an optic fiber. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a set of transmission lines for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift in the etalon. In one example, the optical components are aligned so that laser wavelength detector receives a portion of the laser beam directly from the laser so that phase characteristics of the laser beam are not affected by an intervening beamsplitter thereby permitting improved wavelength locking. In another embodiment, an etalon chirp filter is provided for reducing or eliminating optical frequency chirp, regardless of the particular ITU channel being used for transmission.
    • 该方法和系统用于校准密集波分复用器(DWDM)的传输激光器并将激光器锁定到所选择的传输波长。 在一个示例中,传输激光器是要调谐到一组国际电信联盟(ITU)传输网格线之一的可广泛调谐的激光器(WTL),用于通过光纤传输。 为了将WTL锁定到国际电联电网线路,来自WTL的输出波束的一部分被路由通过标准具将光束分成一组传输线,以便由标准具条纹检测器进行检测。 光束的另一部分直接路由到激光波长检测器。 波长锁定控制器比较来自两个检测器的信号,并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准,然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后,波长锁定控制器监测标准具的温度并保持温度恒定,以防止标准具中的任何波长漂移。 在一个示例中,对准光学部件,使得激光波长检测器直接从激光器接收激光束的一部分,使得激光束的相位特性不受中间分束器的影响,从而允许改进的波长锁定。 在另一个实施例中,提供标准具啁啾滤波器用于减少或消除光频率啁啾,而不管用于传输的特定ITU信道。