CONTINUOUS WAVE OPTICAL TWO-WAY TIME TRANSFER

    公开(公告)号:US20240136786A1

    公开(公告)日:2024-04-25

    申请号:US18045591

    申请日:2022-10-11

    CPC classification number: H01S3/13 G02F2/02 G02F2203/56

    Abstract: Embodiments herein describe a continuous wave two-way optical time two-way transfer system. The embodiments herein lock a local frequency comb to a clock (e.g., optical/microwave atomic clock, Fabry-Perot optical reference cavity, etc.) in a local platform. The platform then generates two CW optical signals with different frequencies and locks those optical signals to the local frequency comb. The local platform then transmits its two CW optical signals to a remote platform and receives CW optical signals (having approximately the same frequencies as the two CW optical signals generated by the local platform) from the remote platform. Based on comparing its local CW optical signals with the received CW optical signals, the local platform can determine a timing deviation between its clock and a clock in the second platform.

    LASER SYSTEMS FOR SPECTROSCOPY
    3.
    发明公开

    公开(公告)号:US20240159971A1

    公开(公告)日:2024-05-16

    申请号:US18054428

    申请日:2022-11-10

    CPC classification number: G02B6/3594 G02B6/29395 G02B6/354

    Abstract: Embodiments herein describe spectroscopy systems that provide frequency, amplitude, and power-stabilized light to a vapor cell. An optical signal can be split into two optical paths where a first optical path includes an AOM to perform frequency and amplitude modulation to generate a pump optical signal and a second optical path that includes a variable optical attenuator (VOA) for generating a probe optical signal. These optical signals can then be provided into a vapor cell (also referred to as a gas cell) to perform spectroscopy.

    INTEGRATED CIRCUIT FOR A HIGHLY FLEXIBLE LOW NOISE LASER CURRENT SOURCE

    公开(公告)号:US20220302673A1

    公开(公告)日:2022-09-22

    申请号:US17208103

    申请日:2021-03-22

    Abstract: Embodiments herein describe an ASIC design where certain portions of the laser driver are controllable by the user. In one embodiment, the ASIC may include one or more pins which provide a connection interface where the user can electrically connect a sense resistor that corresponds to the particular laser being used. The remaining portions of the laser driver are implemented in the ASIC, thereby giving the user the flexibility to adapt the laser driver to her selected laser while having the advantages that come from using an ASIC.

    INTEGRATED END MIRROR ASSEMBLY FOR A FIBER RING LASER

    公开(公告)号:US20240128704A1

    公开(公告)日:2024-04-18

    申请号:US18046427

    申请日:2022-10-13

    CPC classification number: H01S3/06791 H01S3/005

    Abstract: Embodiments herein describe a path length adjuster for, e.g., adjusting the length of an optical cavity of a laser. In one embodiment, the path length adjuster includes a circulator element for ensuring unidirectional lasing. The path length adjuster may also include one or more focusing elements such as a focusing lens and/or a collimator which directs received laser light at a mirror. The mirror is mounted on an actuator that moves the mirror in a direction parallel with the propagation of the laser light, thereby increasing or reducing the length of the ring cavity.

    NOISE MITIGATION IN VAPOR CELL SPECTROSCOPY
    7.
    发明公开

    公开(公告)号:US20240094055A1

    公开(公告)日:2024-03-21

    申请号:US17933735

    申请日:2022-09-20

    CPC classification number: G01J3/4338 G01J3/0205

    Abstract: Embodiments herein describe spectroscopy systems that use an unmodulated reference optical signal to mitigate noise, or for other advantages. In one embodiment, the unmodulated reference optical signal is transmitted through the same vapor cell as a modulated pump optical signal. As such, the unmodulated reference optical signal experiences absorption by the vapor, which converts laser phase noise to amplitude noise like the other optical signals passing through the vapor cell. In one embodiment, the unmodulated reference optical signal has an optical path in the gas cell that is offset (or non-crossing) from the optical path of the modulated pump optical signal. The unmodulated reference optical signal allows removal or mitigation of the noise on the other optical signal.

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