公开(公告)号：WO2017218467A1

公开(公告)日：2017-12-21

申请号：PCT/US2017/037148

申请日：2017-06-13

Applicant: VIXAR, LLC ,  VOCALZOOM SYSTEMS LTD

Inventor： JOHNSON, Klein ,  FISHMAN, Tal ,  BAKISH, Tal

IPC: H01S5/00 ,  H01S5/022 ,  H01S5/183

Abstract: A system and method for generating, enhancing, and detecting the amplitude and phase modulation of a laser under a condition of self-mixing is provided. The system may comprise a laser and a detector to extract the characteristic self-mix signal, which is then interpreted using algorithms implemented in hardware or software. In the case of the laser being a Vertical Cavity Surface Emitting laser (VCSEL), the output signal can be detected by monitoring the surface light emission by means of a beam splitter, or in some embodiments as emission from the bottom surface of the laser. In some embodiments, the system may further comprise a wavelength filter such as an etalon in the signal path.

Abstract translation: 提供了一种用于在自混合的条件下产生，增强和检测激光器的振幅和相位调制的系统和方法。 该系统可以包括激光器和检测器以提取特征性自混合信号，然后使用在硬件或软件中实施的算法来解释该特征性自混合信号。 在作为垂直腔面发射激光器（VCSEL）的激光器的情况下，可以通过借助于分束器监测表面发光来检测输出信号，或者在一些实施方式中通过监测来自激光器底面的发射来检测输出信号。 在一些实施例中，系统还可以包括信号路径中的波长滤波器，例如标准具。

公开(公告)号：WO2019058366A1

公开(公告)日：2019-03-28

申请号：PCT/IL2018/051041

申请日：2018-09-17

Applicant: VOCALZOOM SYSTEMS LTD.

Inventor： FISHMAN, Tal ,  BAKISH, Tal

IPC: G01S7/491 ,  G01S5/18

Abstract: A device has a laser unit, which includes: a top-side p-type DBR region; which is on top of and in direct touch with an active region; which is on top of and in direct touch with a bottom-side n-type Distributed Bragg Reflector (DBR) region; which is on top of a n-type substrate. The laser unit further includes a voltage measurement anode touching or being in proximity to a top surface of the active region; and a voltage measurement cathode touching or being in proximity to a bottom surface of the active region. The voltage between the voltage measurement anode and the voltage measurement cathode is directly measured; and is utilized for determining characteristics of a laser self-mix signal of the laser unit, without having or using a monitor photo-diode.

公开(公告)号：WO2017122099A1

公开(公告)日：2017-07-20

申请号：PCT/IB2017/050015

申请日：2017-01-04

Applicant: VOCALZOOM SYSTEMS LTD.

Inventor： BLUMKIN, Alexander ,  GANANI, Amir ,  FISHMAN, Tal ,  BAKISH, Tal

IPC: G01C3/08 ,  H01S3/00 ,  H04R29/00 ,  G01S17/50

CPC classification number: H04B10/506 ,  H04B10/503 ,  H04R23/008 ,  H04R23/02

Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.

Abstract translation: 基于激光的设备或传感器包括：具有第一自混频载波频率的第一激光发射机; 具有不同的第二自混频载波频率的第二激光发射机; 第一监视器光电二极管，用于从第一激光发射器接收第一光信号并输出​​第一电信号; 第二监控光电二极管，用于从第二激光发射器接收第一光信号并输出​​第二电信号; 电连接，将第一电信号和第二电信号连接在一起，形成组合的电信号; 单个激光接收器接收组合的电信号并从中产生对应于（i）第一激光发射器的光学反馈和（ii）第二激光发射器的光学反馈两者的频谱。 或者，使用单个监视器光电二极管，接收来自多个激光发射器的光信号，并将单个电信号输出到单个激光接收器。

公开(公告)号：WO2017017591A1

公开(公告)日：2017-02-02

申请号：PCT/IB2016/054415

申请日：2016-07-25

Applicant: VOCALZOOM SYSTEMS LTD.

Inventor： FISHMAN, Tal ,  BAKISH, Tal

IPC: G10L15/20 ,  H04R23/00

CPC classification number: H04R23/008 ,  H04R3/005 ,  H04R17/02 ,  H04R19/04 ,  H04R23/02 ,  H04R2410/05 ,  H04R2499/11 ,  H04R2499/13 ,  H04R2499/15

Abstract: Laser microphone, laser-based microphone, and optical microphone utilizing mirrors having different properties. A laser microphone includes at least two mirrors: a front-side mirror, and a rear-side mirror. The reflectivity of the front-side mirror, is different from the reflectivity of the rear-side mirror; thereby increasing the efficiency or the accuracy of self-mixing of signals in the laser microphone. Additionally or alternatively, the front-side mirror has a first number of Distributed Bragg Reflector (DBR) layers; and the rear-side mirror has a second, different, number of DBR layers; thereby increasing the efficiency or the accuracy of self-mixing of signals in the laser microphone.

Abstract translation: 激光麦克风，基于激光的麦克风和使用具有不同特性的镜子的光学麦克风。 激光麦克风包括至少两个反射镜：前侧镜和后侧镜。 前侧反射镜的反射率不同于后侧反射镜的反射率; 从而提高激光麦克风中信号的自混合的效率或精度。 另外或替代地，前侧反射镜具有第一数量的分布布拉格反射器（DBR）层; 并且后侧反射镜具有第二不同数量的DBR层; 从而提高激光麦克风中信号的自混合的效率或精度。

公开(公告)号：WO2019058366A8

公开(公告)日：2019-03-28

申请号：PCT/IL2018/051041

申请日：2018-09-17

Applicant: VOCALZOOM SYSTEMS LTD.

Inventor： FISHMAN, Tal ,  BAKISH, Tal

IPC: G01S7/491 ,  H01S5/18

Abstract: A device has a laser unit, which includes: a top-side p-type DBR region; which is on top of and in direct touch with an active region; which is on top of and in direct touch with a bottom-side n-type Distributed Bragg Reflector (DBR) region; which is on top of a n-type substrate. The laser unit further includes a voltage measurement anode touching or being in proximity to a top surface of the active region; and a voltage measurement cathode touching or being in proximity to a bottom surface of the active region. The voltage between the voltage measurement anode and the voltage measurement cathode is directly measured; and is utilized for determining characteristics of a laser self-mix signal of the laser unit, without having or using a monitor photo-diode.

公开(公告)号：WO2017017592A1

公开(公告)日：2017-02-02

申请号：PCT/IB2016/054416

申请日：2016-07-25

Applicant: VOCALZOOM SYSTEMS LTD.

Inventor： FISHMAN, Tal ,  BLUMKIN, Alexander ,  OFEK, Guy ,  KEYDAR, Eytan ,  BAKISH, Tal

IPC: G01H9/00 ,  G10L15/20

CPC classification number: H04R23/008 ,  H04R3/005 ,  H04R17/02 ,  H04R19/04 ,  H04R23/02 ,  H04R2410/05 ,  H04R2499/11 ,  H04R2499/13 ,  H04R2499/15

Abstract: Optical microphone, laser-based microphone, and laser microphone having reduced-noise components of low-noise components. A laser microphone comprises a laser-diode associated with a low-noise laser driver TX; and a photo-diode associated with a low-noise photo-diode receiver RX. The low-noise laser driver TX supplies a drive current which is a combination of a Direct Current component having a first bandwidth, and an attenuated version of an Alternating Current component having a second, different, bandwidth. Additionally or alternatively, the low- noise photo-diode receiver RX utilizes hardware-based demodulation of the analog signal, and operates to remove a Direct Current component of its output signal prior to digitization.

Abstract translation: 光学麦克风，基于激光的麦克风和具有低噪声分量的低噪声分量的激光麦克风。 激光麦克风包括与低噪声激光驱动器TX相关联的激光二极管; 以及与低噪声光电二极管接收器RX相关联的光电二极管。 低噪声激光驱动器TX提供驱动电流，其是具有第一带宽的直流分量和具有第二不同带宽的交流电流分量的衰减版本的组合。 附加地或替代地，低噪声光电二极管接收器RX利用模拟信号的基于硬件的解调，并且在数字化之前操作以去除其输出信号的直流分量。

公开(公告)号：WO2017017572A1

公开(公告)日：2017-02-02

申请号：PCT/IB2016/054364

申请日：2016-07-21

Applicant: VOCALZOOM SYSTEMS LTD.

Inventor： FISHMAN, Tal ,  BLUMKIN, Alexander ,  ELHAMIAS, Reuven ,  LEVY, Gil ,  BAKISH, Tal

IPC: H04R1/00

CPC classification number: H04R23/008 ,  H04R3/005 ,  H04R17/02 ,  H04R19/04 ,  H04R23/02 ,  H04R2410/05 ,  H04R2499/11 ,  H04R2499/13 ,  H04R2499/15

Abstract: A system includes a laser microphone or laser-based microphone or optical microphone. The laser microphone includes a laser transmitter to transmit an outgoing laser beam towards a face of a human speaker. The laser transmitter acts also as a self-mix interferometry unit that receives the optical feedback signal reflected from the face of the human speaker, and generates an optical self- mix signal by self-mixing interferometry of the laser power and the received optical feedback signal; and a speckles noise reducer to reduce speckles noise and to increase a bandwidth of the optical self-mix signal. The speckles noise reducer optionally includes a vibration unit or displacement unit, to cause vibrations or displacement of one or more mirrors or optics elements of the laser microphone, to thereby reduce speckles noise. The speckles noise reducer optionally includes a dynamic laser modulation modifier unit, to dynamically modify modulation properties of a laser modulator associated with the laser transmitter; optionally by modifying an operating temperature of the laser. Optionally, modifications are performed based on a timing scheme, or based on a pseudo-random scheme, or based on a calibration process that selects an advantageous modification scheme. Optionally, the system detects self-mix signal magnitude or bandwidth or quality, and activates the speckles noise reduction mechanism if the self-mix signal appears to be weak or low-quality.

Abstract translation: 系统包括激光麦克风或基于激光的麦克风或光学麦克风。 激光麦克风包括激光发射器，用于将输出的激光束传送到人类扬声器的面部。 激光发射器还用作接收从人类讲话者的面反射的光学反馈信号的自混合干涉测量单元，并且通过激光功率和接收的光学反馈信号的自混合干涉测量产生光学自混合信号 ; 以及散斑降噪器，以减少斑点噪声并增加光学自混合信号的带宽。 斑点噪声减少器可选地包括振动单元或位移单元，以引起激光麦克风的一个或多个反射镜或光学元件的振动或位移，从而减少斑点噪声。 斑点噪声减少器可选地包括动态激光调制修改器单元，以动态地修改与激光发射器相关联的激光调制器的调制特性; 可选地通过改变激光器的工作温度。 可选地，基于定时方案或基于伪随机方案或基于选择有利的修改方案的校准过程来执行修改。 可选地，系统检测自混合信号幅度或带宽或质量，并且如果自混合信号看起来是弱的或低质量的，则激活散斑噪声降低机制。