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公开(公告)号：US5256164A
公开(公告)日：1993-10-26
申请号：US999577
申请日：1992-12-30
Applicant: Aram Mooradian
Inventor： Aram Mooradian
IPC: G02F1/39 , H01S3/06 , H01S3/063 , H01S3/08 , H01S3/0941 , H01S3/106 , H01S3/108 , H01S3/109 , H01S3/16 , H01S3/23 , H01L21/20
CPC classification number: H01S3/0627 , H01S3/0632 , H01S3/09415 , H01S3/106 , H01S3/109 , G02F1/39 , H01S3/025 , H01S3/0604 , H01S3/08031 , H01S3/102 , H01S3/1028 , H01S3/108 , H01S3/1611 , H01S3/1643 , H01S3/1688 , H01S3/2383
Abstract: A gain medium is disposed between two mirrors to form a resonant cavity. The cavity length is selected so that the gain bandwidth of the gain medium is less than or substantially equal to the frequency separation of the cavity modes and such that a cavity mode frequency falls within the gain bandwidth. A nonlinear optical material is disposed either inside or outside the cavity to generate new laser wavelengths. The nonlinear optical material may be contained in a cavity which is resonant at the microchip laser frequency. Alternatively, the microchip laser may be tuned, for example thermally or by the application of a longitudinal or transverse stress, to the frequency of the resonant cavity. The laser is optically pumped by any appropriate source such as a semiconductor injection laser or laser array. Suitable gain media include Nd:YAG, Nd:GSGG and Nd pentaphosphate, and suitable non-linear optical material include MqO:LiNbO.sub.3 and KTP.
Abstract translation: 增益介质设置在两个反射镜之间以形成谐振腔。 选择腔长度使得增益介质的增益带宽小于或基本上等于腔模的频率间隔，并且使得腔模式频率落入增益带宽内。 非线性光学材料被设置在空腔的内部或外部以产生新的激光波长。 非线性光学材料可以包含在以微芯片激光频率谐振的空腔中。 或者，微芯片激光器可以例如通过加热或通过施加纵向或横向应力来调谐到谐振腔的频率。 激光器由任何适当的光源泵浦，例如半导体注入激光器或激光器阵列。 合适的增益介质包括Nd：YAG，Nd：GSGG和Nd五磷酸盐，合适的非线性光学材料包括MqO：LiNbO3和KTP。
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公开(公告)号：US4933947A
公开(公告)日：1990-06-12
申请号：US353870
申请日：1989-05-18
Applicant: Douglas W. Anthon , Donald L. Sipes, Jr.
Inventor： Douglas W. Anthon , Donald L. Sipes, Jr.
CPC classification number: H01S3/109 , H01S2301/02 , H01S3/1028
Abstract: An intracavity frequency-modified laser of improved amplitude stability is obtained by substantially eliminating spatial hole burning in the lasant material and maintaining the optical cavity of the laser at a temperature which results in substantially noise-free generation of output radiation.
Abstract translation: 通过基本上消除惰性材料中的空间空穴燃烧并将激光器的光腔保持在导致基本上无噪声地产生输出辐射的温度下，获得了具有改善的振幅稳定性的腔内频率修正激光器。
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公开(公告)号：US20240055821A1
公开(公告)日：2024-02-15
申请号：US18258140
申请日：2021-12-17
Inventor： Eduardo GRANADOS MATEO , Valentin N. FEDOSSEEV , Katerina CHRYSALIDIS , Richard P. MILDREN
IPC: H01S3/08031 , H01S3/06 , H01S3/094 , H01S3/102 , H01S3/30
CPC classification number: H01S3/08031 , H01S3/0606 , H01S3/094038 , H01S3/1028 , H01S3/30 , H01S3/0627
Abstract: A Raman laser conversion device for generating a single longitudinal mode, SLM, laser output is disclosed. The device comprises a Raman medium that exhibits a Stokes emission when subject to pumping by a laser pump input, the laser pump input having a pump linewidth and the Raman medium having a Raman linewidth; wherein the Raman medium is configured to define feedback interfaces of a resonator such that the Stokes emission resonates within the Raman medium; and further wherein the free spectral range, FSR, of the resonator with respect to the pump linewidth and/or the Raman linewidth or a function thereof is such that only one longitudinal mode of the Stokes emission is able to resonate within the Raman medium; whereby the laser conversion device generates a SLM laser output that is frequency shifted with respect to the laser pump input.
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公开(公告)号：US20190204213A1
公开(公告)日：2019-07-04
申请号：US16353084
申请日：2019-03-14
Applicant: SHENZHEN UNIVERSITY
Inventor： Peiguang YAN , Hao CHEN , Fengfei XING , Min ZHANG
CPC classification number: G01N21/31 , G01N21/39 , G01N33/1826 , H01S3/06791 , H01S3/094003 , H01S3/1028 , H01S3/115
Abstract: The present disclosure provides an apparatus and a method for measuring a concentration of pollutants in water. A passive Q-switched fiber laser outputs an evanescent wave to a to-be-tested water sample after emitting a Q-switched pulse laser signal and transmitting it via an evanescent field fiber, and based on an evanescent wave change caused by an absorption effect of the pollutants in the to-be-tested water sample to the evanescent wave and an output repetition frequency change of the passive Q-switched fiber laser due to the evanescent wave change, outputs an output repetition frequency result of the passive Q-switched fiber laser. The method is simple; and the apparatus based on the method is simple in structure and low in cost.
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公开(公告)号：US20180226766A1
公开(公告)日：2018-08-09
申请号：US15847872
申请日：2017-12-19
Applicant: KM Labs Inc.
Inventor： Matthew S. Kirchner , Sterling Backus
IPC: H01S3/16 , H01S3/0941 , H01S3/042 , H01S5/40 , H01S5/022 , H01S3/10 , H01S3/11 , H01S3/23 , H01S3/04
CPC classification number: H01S3/1625 , H01S3/025 , H01S3/0407 , H01S3/042 , H01S3/08072 , H01S3/0813 , H01S3/09408 , H01S3/094084 , H01S3/0941 , H01S3/09415 , H01S3/10007 , H01S3/10061 , H01S3/1028 , H01S3/1106 , H01S3/1636 , H01S3/2308 , H01S3/235 , H01S5/02284 , H01S5/32341 , H01S5/4012 , H01S5/4025
Abstract: Direct diode-pumped Ti:sapphire laser amplifiers use fiber-coupled laser diodes as pump beam sources. The pump beam may be polarized or non-polarized. Light at wavelengths below 527 nm may be used in cryogenic configurations. Multiple diode outputs may be polarization or spectrally combined.
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Patent Agency Ranking
公开(公告)号：US20180166847A1
公开(公告)日：2018-06-14
申请号：US15892562
申请日：2018-02-09
Applicant: RANOVUS INC.
Inventor： Bin CAO , Dylan LOGAN , Douglas J. S. BECKETT , Rong CHEN , Andrew Peter KNIGHTS
CPC classification number: H01S3/1028 , G02F1/011 , G02F1/0121 , G02F1/0147 , G02F2203/15 , G02F2203/21 , H01S3/083
Abstract: A device and method for tuning a ring resonator using self-heating stabilization is provided. A light source is controlled to produce an optical signal, input to an optical ring resonator, at a power where self-heating shifts a resonance wavelength of the optical ring resonator by at least 10 picometers, the self-heating comprising absorption in the optical ring resonator of optical power from a received optical signal. Prior to using the optical ring resonator at least one of modulate and filter the optical signal at the optical ring resonator, a heater of the optical ring resonator is controlled to an operating temperature at which the resonance wavelength of the optical ring resonator is greater than a respective wavelength of the optical signal.
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公开(公告)号：US09948056B2
公开(公告)日：2018-04-17
申请号：US15407966
申请日：2017-01-17
Applicant: LGS Innovations LLC
Inventor： Inuk Kang
CPC classification number: H01S3/0637 , G02B6/29338 , H01S3/083 , H01S3/10084 , H01S3/1028 , H01S3/1608
Abstract: Ring resonators and methods of making and using the same are disclosed. In certain embodiments, a ring resonator may include a waveguide comprising a pump bus and a signal bus disposed adjacent a ring guide, the pump bus and signal bus configured to couple electromagnetic signals to and from ring guide, wherein at least a portion of the waveguide comprises erbium-doped silica and a cladding material disposed adjacent the waveguide, wherein the cladding material exhibits an index of refraction that is lower than an index of refraction of the waveguide, wherein the ring resonator exhibits a propagation loss of less than 2 dB/m.
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公开(公告)号：US09713855B2
公开(公告)日：2017-07-25
申请号：US14404513
申请日：2013-05-30
Applicant: SNECMA
Inventor： Yves Le Meur , Jean-Baptiste Mottin
IPC: B23K26/38 , H01S3/042 , B23K26/14 , H01S3/093 , H01S3/102 , B23K26/0622 , B23K26/382 , B23K101/00 , H01S3/04 , H01S3/06 , H01S3/16
CPC classification number: B23K26/1435 , B23K26/0622 , B23K26/382 , B23K26/389 , B23K2101/001 , H01S3/0407 , H01S3/061 , H01S3/093 , H01S3/1028 , H01S3/1643
Abstract: A method of drilling a part, or a turbine engine part, by a pulse laser generator including a cavity in which there is mounted a solid bar for generating laser pulses, the method including determining values of a plurality of operating parameters of the laser generator for forming orifices of predetermined diameter in the part, and taking account, among the parameters, of a setpoint value for the temperature of the laser cavity, which value is determined as a function of characteristics of the orifices to be drilled.
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公开(公告)号：US09705278B2
公开(公告)日：2017-07-11
申请号：US14869002
申请日：2015-09-29
Applicant: Kotura, Inc.
Inventor： Saeed Fathololoumi , Dazeng Feng , Amir Ali Tavallaee , Jacob Levy , Pegah Seddighian , Mehdi Asghari
CPC classification number: H01S3/10053 , H01S3/09 , H01S3/1028 , H01S3/106 , H01S5/0021 , H01S5/02248 , H01S5/02446 , H01S5/026 , H01S5/0687 , H01S5/141
Abstract: An optical system includes a laser cavity on a base. The laser cavity generates a light signal in response to application of an electrical current to the laser cavity. The system includes first electronics that apply a target level of the electrical current to the laser cavity so as to cause the laser cavity to generate the light signal. The light signal experiences mode hops at electrical current levels that shift to higher current levels in response to increasing laser operation times. A first one of the mode hops occurs at a first current level and a second one of the mode hops occurs at a second current level that is higher than the first current level. The system also includes a phase shifter that interacts with the laser cavity so as to shift the mode hops to lower current levels than occur in the absence of the phase shifter.
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公开(公告)号：US09407055B2
公开(公告)日：2016-08-02
申请号：US14684280
申请日：2015-04-10
Applicant: CALIFORNIA INSTITUTE OF TECHNOLOGY
Inventor： Seheon Kim , Axel Scherer , Aditya Rajagopal , Chieh-Feng Chang
IPC: H01S3/06 , H01S3/091 , H01S3/102 , H01S3/02 , H01S3/115 , H01S5/30 , H01S3/105 , H01S5/06 , H01S5/10 , A61B5/1459
CPC classification number: H01S3/0627 , A61B5/1459 , H01S3/025 , H01S3/091 , H01S3/102 , H01S3/1028 , H01S3/105 , H01S3/115 , H01S5/0607 , H01S5/0612 , H01S5/1042 , H01S5/3013
Abstract: A microlaser system includes an optical source, a microlaser, an actuator switch, and a photovoltaic power source. The microlaser, which includes a control element, is optically pumped by at least a portion of light emitted by the optical source. The actuator switch is configured to be activated by a triggering event. Furthermore, the photovoltaic power source is coupled in a series connection with the actuator switch and the control element, the series connection configured to connect the photovoltaic power source to the control element of the microlaser when the actuator switch is activated by the triggering event.
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