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    System and a method for frequency-stabilizing a diode laser
    101.
    发明授权
    System and a method for frequency-stabilizing a diode laser 失效
    用于频率稳定二极管激光器的系统和方法

    公开(公告)号：US6009111A

    公开(公告)日：1999-12-28

    申请号：US62629

    申请日：1998-04-17

    Applicant: Kristan L. Corwin ,  Zheng-Tian Lu ,  Carter F. Hand ,  Ryan J. Epstein ,  Carl E. Wieman

    Inventor： Kristan L. Corwin ,  Zheng-Tian Lu ,  Carter F. Hand ,  Ryan J. Epstein ,  Carl E. Wieman

    IPC: H01S3/13 ,  H01S5/0687

    CPC classification number: H01S5/0687 ,  H01S3/1303

    Abstract: A robust method of stabilizing a diode laser frequency to an atomic transition is provided. The method employs Zeeman shift to generate an anti-symmetric signal about a Doppler-broadened atomic resonance, and, therefore, offers a large recapture range as well as high stability. The frequency of a 780 nm diode laser, stabilized to such a signal in Rb, drifts less than 0.5 MHz.sub.pk-pk (one part in 10.sup.9) in thirty-eight hours. This tunable frequency lock may be inexpensively constructed, requires little laser power, rarely loses lock, and may be extended to other wavelengths by using different atomic species.

    Abstract translation: 提供了将二极管激光器频率稳定到原子跃迁的鲁棒方法。 该方法采用塞曼偏移来产生关于多普勒扩展原子共振的反对称信号，因此提供了大的再捕获范围以及高稳定性。 稳定在Rb中的这种信号的780nm二极管激光器的频率在三十八小时内漂移小于0.5MHzpk-pk（109中的一部分）。 这种可调谐的频率锁定可以廉价地构造，需要很少的激光功率，很少失去锁定，并且可以通过使用不同的原子种类而扩展到其它波长。

    Wavelength reference for excimer laser
    102.
    发明授权
    Wavelength reference for excimer laser 失效
    准分子激光器的波长参考

    公开(公告)号：US5978391A

    公开(公告)日：1999-11-02

    申请号：US896384

    申请日：1997-07-18

    Applicant: Palash P. Das ,  Richard L. Sandstrom ,  Igor Fomenkov

    Inventor： Palash P. Das ,  Richard L. Sandstrom ,  Igor Fomenkov

    IPC: G01M11/00 ,  G01J3/02 ,  G01J3/06 ,  G01J9/00 ,  G03F7/20 ,  H01S3/00 ,  H01S3/03 ,  H01S3/034 ,  H01S3/13 ,  H01S3/134 ,  H01S3/137 ,  H01S3/139 ,  H01S3/225

    CPC classification number: H01S3/1303 ,  G01J9/00 ,  G03F7/70025 ,  G03F7/70041 ,  G03F7/70558 ,  G03F7/70575 ,  H01S3/03 ,  H01S3/134 ,  H01S3/225 ,  H01S3/1392

    Abstract: The preferred embodiment of the invention uses known atomic or molecular absorptions as absolute wavelength standards for calibrating wavelength measurement instruments used in tunable lasers. Examples of atomic and molecular absorptions are carbon and molecular oxygen that have absorptions including 193.0905 nm and 193.2728 nm, respectively, for use with a tunable Argon Fluoride excimer laser at approximately 193 nm. A wavelength measuring device (e.g., a wavemeter) is equipped with a gas cell containing the absorption gas. During a calibration procedure, the wavelength measured by the wavemeter is compared to the atomic or molecular absorption. The wavemeter's calibration constants are then adjusted accordingly to match the wavemeter's output to the atomic or molecular absorption wavelength. Such calibration procedures, therefore, calibrate the wavemeter to absolute standards and correct for any drift in the wavemeter that may occur between calibrations. Some gases, such as molecular oxygen, have multiple molecular absorptions within the tunable range of the laser. The use of multiple absorptions during calibration procedure enhances the precision of the procedure due to the proximity of an absorption line to the final wavelength of interest. After calibration, the laser is tuned to the final wavelength of interest using the calibrated wavemeter.

    Abstract translation: 本发明的优选实施方案使用已知的原子或分子吸收作为用于校准可调激光器中使用的波长测量仪器的绝对波长标准。 原子和分子吸收的实例是碳和分子氧，它们分别具有包括193.0905nm和193.2728nm的吸收，用于在约193nm的可调谐氩化物准分子激光器。 波长测量装置（例如波分计）装备有包含吸收气体的气室。 在校准过程中，将波分计测得的波长与原子或分子吸收进行比较。 然后相应调整波形计的校准常数，以将波长计的输出与原子或分子吸收波长相匹配。 因此，这种校准程序将波形计校准为绝对标准，并校正校准之间可能发生的波长计中的任何漂移。 一些气体，如分子氧，在激光器的可调谐范围内具有多个分子吸收。 在校准过程中使用多重吸收增加了由于吸收线与感兴趣的最终波长的接近而导致的程序精度。 校准后，使用校准波长计将激光器调谐到感兴趣的最终波长。

    Wavelength stabilizing light source apparatus by maintaining a constant phase difference
    103.
    发明授权
    Wavelength stabilizing light source apparatus by maintaining a constant phase difference 失效
    波长稳定光源装置通过保持恒定的相位差

    公开(公告)号：US5535003A

    公开(公告)日：1996-07-09

    申请号：US413909

    申请日：1995-03-30

    Applicant: Hiroyuki Kawashima ,  Fumio Ohtomo ,  Susumu Saito ,  Isao Minegishi

    Inventor： Hiroyuki Kawashima ,  Fumio Ohtomo ,  Susumu Saito ,  Isao Minegishi

    IPC: H01S5/068 ,  G01B9/02 ,  H01S3/13 ,  H01S5/0687

    CPC classification number: H01S3/1303 ,  G01J9/0246 ,  H01S5/0687

    Abstract: A wavelength stabilizing light source apparatus comprising a light source, a beam splitter, a scanning mirror, a reflector, a first and a second light receiver, a phase detector and a wavelength stabilizer. The first light receiver receives a first interference signal formed from the interference between coherent light coming from the scanning mirror and coherent light reflected by the first reflecting surface. The second light receiver receives a second interference signal formed from the interference between the coherent light coming from the scanning mirror and the coherent light reflected by the second reflecting surface. The phase detector detects the difference in phase between the first and the second interference signal. The wavelength stabilizer stabilizes the wavelength of the light source by keeping constant the phase difference detected by the phase detector. The apparatus also includes an optical path length difference forming device for keeping a constant difference in length between the first optical path of its first member and the second optical path of its second member despite changes in temperature.

    Abstract translation: 一种波长稳定光源装置，包括光源，分束器，扫描镜，反射器，第一和第二光接收器，相位检测器和波长稳定器。 第一光接收器接收由来自扫描反射镜的相干光和由第一反射表面反射的相干光之间的干涉形成的第一干涉信号。 第二光接收器接收由来自扫描反射镜的相干光与由第二反射面反射的相干光之间的干涉而形成的第二干涉信号。 相位检测器检测第一和第二干涉信号之间的相位差。 波长稳定器通过将相位检测器检测到的相位差保持恒定来稳定光源的波长。 该装置还包括光路长度差形成装置，尽管温度有变化，但仍保持其第一构件的第一光路与其第二构件的第二光路之间的长度上的恒定差。

    Optical frequency synthesizer/sweeper
    107.
    发明授权
    Optical frequency synthesizer/sweeper 失效
    光频合成器/清扫机

    公开(公告)号：US4893353A

    公开(公告)日：1990-01-09

    申请号：US942448

    申请日：1986-12-16

    Applicant: Hideto Iwaoka ,  Akira Ohte ,  Koji Akiyama

    Inventor： Hideto Iwaoka ,  Akira Ohte ,  Koji Akiyama

    IPC: G01J3/28 ,  G01J9/04 ,  G02F1/11 ,  G02F2/00 ,  H01S3/13 ,  H01S5/0687 ,  H04B10/50 ,  H04B10/572 ,  H04B9/00

    CPC classification number: H01S5/0687 ,  G02F1/11 ,  G02F2/002 ,  H04B10/50 ,  H04B10/506 ,  H04B10/572 ,  G01J3/28 ,  G01J9/04 ,  H01S3/1303

    Abstract: An optical frequency synthesizer and/or sweeper, whereby a coherent optical output light is obtained by using a wavelength stabilized laser and an optical phase locked loop wherein the frequency of the output has the characteristics of high accuracy, high stability and narrow spectral line width. The optical phase locked loop comprises a tunable laser, an optical frequency multiplier, an optical frequency shifter and an optical heterodyne detector, wherein the optical phase locked loop is capable of precisely outputting an arbitrary wavelength by feeding back an output optical frequency.

    Abstract translation: 一种光频合成器和/或清扫器，由此通过使用波长稳定的激光器和光锁相环获得相干光输出光，其中输出的频率具有高精度，高稳定性和窄谱线宽度的特性。 光锁相环包括可调激光器，光倍增器，光移频器和光外差检测器，其中光锁相环能够通过反馈输出光频率来精确地输出任意波长。

    Multi-quantum-reference laser frequency stabilization
    108.
    发明授权
    Multi-quantum-reference laser frequency stabilization 有权

    公开(公告)号：US11916350B2

    公开(公告)日：2024-02-27

    申请号：US18137385

    申请日：2023-04-20

    Applicant: ColdQuanta, Inc.

    Inventor： Judith Olson ,  Gabriel Ycas

    IPC: H01S3/13 ,  G04F5/14 ,  H03L7/26 ,  H01S5/0687 ,  H01S3/094

    CPC classification number: H01S3/1303 ,  G04F5/14 ,  H01S3/094076 ,  H01S3/1305 ,  H01S5/0687 ,  H03L7/26

    Abstract: A multi-quantum-reference (MQR) laser frequency stabilization system includes a laser system, an MQR system, and a controller. The laser system provides an output beam with an output frequency, and plural feedback beams with respective feedback frequencies. The feedback beams are directed to the MQR system which includes plural references, each including a respective population of quantum particles, e.g., rubidium 87 atoms, with respective resonant frequencies for respective quantum transitions. The degree to which the feedback frequencies match or deviate from the resonance frequencies can be tracked using fluorescence or other electro-magnetic radiation output from the references. The controller can stabilize the laser system output frequency based on plural reference outputs to achieve both short-term and long-term stability, e.g., in the context of an atomic clock.

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