中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

14 records (took 0.022 seconds)

    SYSTEMS, APPARATUS, AND METHODS FOR PRODUCING ULTRA STABLE, SINGLE-FREQUENCY, SINGLE-TRANSVERSE-MODE COHERENT LIGHT IN SOLID-STATE LASERS
    2.
    发明申请
    SYSTEMS, APPARATUS, AND METHODS FOR PRODUCING ULTRA STABLE, SINGLE-FREQUENCY, SINGLE-TRANSVERSE-MODE COHERENT LIGHT IN SOLID-STATE LASERS 有权

    公开(公告)号：US20210234327A1

    公开(公告)日：2021-07-29

    申请号：US17227489

    申请日：2021-04-12

    Applicant: Shailendhar Saraf

    Inventor： Shailendhar Saraf

    IPC: H01S3/094 ,  H01S3/067 ,  H01S3/0941 ,  G02B6/42 ,  H01S5/02251

    Abstract: A laser system and method generate milliwatt-power pump light by a fiber-coupled laser diode with a single-mode integrated fiber housed in a pump enclosure. The milliwatt-power pump light is conveyed from the single-mode integrated fiber out of the first enclosure into one end of a single-mode fiber cable that is external to the pump enclosure. The milliwatt-power pump light is conveyed from an opposite end of the external single-mode fiber cable into one end of a single-mode resident fiber disposed internally within a laser-head enclosure. A crystal housed in the laser-head enclosure is pumped with the milliwatt-power pump light that exits into free space from an opposite end of the single-mode resident fiber onto a face of the crystal, to produce stable milliwatt-power single-mode laser light having a frequency stability of less than 3 MHz per minute. The stable milliwatt-power single-mode laser light is emitted from the laser-head enclosure.

    SYSTEMS, APPARATUS, AND METHODS FOR PRODUCING ULTRA STABLE, SINGLE-FREQUENCY, SINGLE-TRANSVERSE-MODE COHERENT LIGHT IN SOLID-STATE LASERS
    5.
    发明申请
    SYSTEMS, APPARATUS, AND METHODS FOR PRODUCING ULTRA STABLE, SINGLE-FREQUENCY, SINGLE-TRANSVERSE-MODE COHERENT LIGHT IN SOLID-STATE LASERS 审中-公开

    公开(公告)号：US20190229488A1

    公开(公告)日：2019-07-25

    申请号：US16249360

    申请日：2019-01-16

    Applicant: Shailendhar Saraf

    Inventor： Shailendhar Saraf

    IPC: H01S3/094 ,  H01S3/067 ,  H01S3/0941

    Abstract: A laser system has a fiber cable, a pump enclosure connected to the fiber cable outside of the pump enclosure, and a laser-head enclosure connected to the fiber cable disposed outside of the laser-head enclosure. The pump enclosure houses a fiber-coupled laser diode configured to produce and convey pump light through the pump enclosure out to the fiber cable. The laser-head enclosure houses a crystal. The pump light, when produced by the laser diode, propagates out from the pump enclosure through the fiber cable into the laser-head enclosure and into the crystal. The crystal produces a laser beam in response to the pump light. The integrated fiber of the laser diode, the fiber cable, and internal fiber of the laser-head enclosure, through which the pump light propagates, may be single-mode fibers, to achieve superior laser system performance with lower frequency and intensity noise than pumping through multimode fibers.

    Method and apparatus for controlling ultrasonic transducer
    10.
    发明授权
    Method and apparatus for controlling ultrasonic transducer 有权
    用于控制超声波换能器的方法和装置

    公开(公告)号：US06819027B2

    公开(公告)日：2004-11-16

    申请号：US10091693

    申请日：2002-03-04

    Applicant: Shailendhar Saraf

    Inventor： Shailendhar Saraf

    IPC: H01L4108

    CPC classification number: B06B1/0261

    Abstract: Method and apparatus for implementing ultrasonic systems that maximize efficiency by dynamically detecting and maintaining peak operational resonance frequency. In one embodiment, the invention dynamically sweeps the output frequency range to locate the peak load current. The resonance frequency corresponding to the peak load current is used as a reference frequency in a control loop. The control loop includes a voltage-controlled oscillator (VCO) that is controlled by a loop controller and operates to lock onto the dynamically sensed reference frequency. In response to the VCO output, a pulse-width modulator (PWM) circuit drives a pair of switches that adjust transducer current to maintain the circuit locked on the resonance frequency at a substantially constant current.

    Abstract translation: 用于实现通过动态检测和维持峰值操作共振频率来最大化效率的超声系统的方法和装置。 在一个实施例中，本发明动态扫描输出频率范围以定位峰值负载电流。 对应于峰值负载电流的谐振频率用作控制回路中的参考频率。 控制回路包括压控振荡器（VCO），其由环路控制器控制并且操作以锁定到动态感测的参考频率上。 响应于VCO输出，脉冲宽度调制器（PWM）电路驱动一对开关，其调节换能器电流以将电路保持在基本恒定电流的谐振频率上。

Patent Agency Ranking