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公开(公告)号：US12232805B2
公开(公告)日：2025-02-25
申请号：US17499062
申请日：2021-10-12
Applicant: Boston Scientific Scimed, Inc.
Inventor： Hyun Wook Kang , Raymond Adam Nemeyer , Michael Ray Hodel
Abstract: A laser resonator includes a gain medium that produces light from pump energy and a variable light attenuator, which receives light and emits either (i) a first light including a continuous series of micropulses, or (ii) a second light including a series of macropulses at spaced time intervals, where each macropulse includes a series of micropulses. Each micropulse has a duration of 0.1 to 10 microseconds, and a duration of each macropulse is less than the time interval between each macropulse, and the micropulses have a frequency of 5 kHz to 40 kHz.
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公开(公告)号：US12080987B2
公开(公告)日：2024-09-03
申请号：US17277153
申请日：2019-09-26
Applicant: IMPERIAL COLLEGE INNOVATIONS LIMITED
Inventor： Michael John Damzen , William Richard Kerridge-Johns
CPC classification number: H01S3/1062 , H01S3/083 , H01S3/105 , H01S2301/203
Abstract: A method for generating a spatially transformed optical output from a laser system, the method comprising: disposing a laser gain medium within a laser cavity structure; arranging an interferometric device to complete the laser cavity structure, wherein the interferometric device receives an input beam from laser oscillation in the laser cavity structure, splits the input beam into two sub-beams, and recombines the two sub-beams to provide an optical feedback beam to sustain laser oscillation; configuring the optical components that comprise the interferometric device to provide relative misalignment of the two sub-beams that are produced internally to the interferometric device; using at least a first output port of the interferometric device to provide an output beam of the laser system that due to the misalignment is a spatial transformation of the internal mode structure of the laser; and using at least a second output port of the interferometric device to provide the optical feedback beam to the laser cavity structure that sustains laser oscillation with a spatial structure that substantially preserves the internal mode structure of the laser. An apparatus which implements such a method is also provided.
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3.发明授权公开(公告)号：US12013572B2
公开(公告)日：2024-06-18
申请号：US17708143
申请日：2022-03-30
Applicant: The General Hospital Corporation
Inventor： Benjamin Vakoc , Meena Siddiqui
IPC: H03M1/12 , A61B5/00 , G01B9/02091 , G01K11/32 , G02B6/293 , H01S3/067 , H03M1/20 , H01S3/08 , H01S3/106
CPC classification number: G02B6/2932 , A61B5/0066 , G01B9/02091 , G01K11/32 , H01S3/0675 , H03M1/20 , A61B5/6826 , H01S3/06791 , H01S3/08086 , H01S3/106 , H01S3/1062
Abstract: Exemplary apparatus can be provided which can include a laser arrangement that is configured to provide a laser radiation, and including an optical cavity. The optical cavity can include a dispersive optical waveguide first arrangement having first and second sides, and which is configured to (i) receive at least one first electro-magnetic radiation at the first side so as to provide at least one second electro-magnetic radiation, and (ii) to receive at least one third electro-magnetic radiation at the second side so as to provide at least one fourth electro-magnetic radiation. The first and second sides are different from one another, and the second and third radiations are related to one another. The optical cavity can also include an active optical modulator second arrangement which can be configured to receive and modulate the fourth radiation so as to provide the first electro-magnetic radiation to the first arrangement. The laser radiation can be associated with at least one of the first, second, third or fourth radiations.
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公开(公告)号：US12007606B2
公开(公告)日：2024-06-11
申请号：US17172416
申请日：2021-02-10
Inventor： Kyoungsik Yu , Gyeongho Son , Mohamad Syahadi
CPC classification number: G02B6/2934 , G02B6/10 , G02B6/245 , G02B6/255 , H01P7/082 , H01S3/1062
Abstract: A ring resonator includes a core. Both ends of the core in a lengthwise direction are connected to have a circular shape. The ring resonator further includes a cladding surrounding the core, a jacket surrounding the cladding and a sleeve surrounding a portion of the jacket. A portion of the core is exposed from the cladding and the jacket.
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公开(公告)号：US20240136785A1
公开(公告)日：2024-04-25
申请号：US18264956
申请日：2022-02-11
Applicant: The University of Birmingham
Inventor： Kai BONGS , Mehdi LANGLOIS , Luuk EARL , Michael HOLYNSKI
CPC classification number: H01S3/107 , G01V7/04 , H01S3/06754 , H01S3/1068 , H01S3/109 , H01S3/1608 , H01S2302/00
Abstract: A single arm laser system comprising a first in-phase quadrature modulator, IQM. The first IQM is configured to receive a single frequency fibred laser beam from a frequency locked laser seed, generate a first single side-band frequency based on a carrier frequency of the single frequency fibred laser beam and suppress the carrier frequency, and output a first fibre laser beam having a single side-band suppressed carrier frequency. The single arm laser system also comprises a second IQM in line with the first IQM. The second IQM is configured to receive the first fibre laser beam from the first IQM, generate a second single side-band frequency based on the first single side-band frequency and maintain the first single side-band frequency as the carrier frequency, and output a second fibre laser beam having the first and second single side band frequencies.
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Patent Agency Ranking
公开(公告)号：US20240055829A1
公开(公告)日：2024-02-15
申请号：US18259145
申请日：2021-01-18
Applicant: Nippon Telegraph and Telephone Corporation
Inventor： Takuma Tsurugaya , Shinji Matsuo
IPC: H01S5/14 , H01S3/106 , H01S5/0687
CPC classification number: H01S5/141 , H01S3/1062 , H01S5/0687
Abstract: A semiconductor laser includes a first optical waveguide including a first reflection unit and a second reflection unit, and a confinement portion. The first reflection unit and the second reflection unit are waveguide type reflection units each having a structure in which the refractive index is periodically modulated. The first reflection unit, the confinement portion, and the second reflection unit constitute a Fabry-Perot type optical resonator. The semiconductor laser also includes a second optical waveguide disposed along a first optical waveguide to extend from the confinement portion to the second reflection unit side. The second optical waveguide serves as an extraction optical waveguide. Further, a third reflection unit formed continuously with the second optical waveguide is provided at a location corresponding to the first reflection unit.
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7.发明公开公开(公告)号：US20230402813A1
公开(公告)日：2023-12-14
申请号：US17837883
申请日：2022-06-10
Applicant: Candela Corporation
Inventor： Xiaoming Shang , Zhi Huang , Junjie Zeng , Kevin Schomacker
CPC classification number: H01S3/1115 , H01S3/094038 , H01S3/094049 , H01S3/0064 , H01S3/1312 , H01S3/2316 , H01S3/2333 , H01S3/1061 , H01S3/1611 , H01S3/1633 , H01S3/092 , H01S3/094061
Abstract: A sub-nanosecond laser system is disclosed. The sub-nanosecond laser system may include: a pump laser source operable to generate a pump laser beam having a pump wavelength; a first pump beam splitter operable to receive the pump laser beam and split the pump laser beam into at least a first split pump laser beam and a second split pump laser beam; a passively Q-switched seed laser operable to receive the first split pump laser beam and generate a seed laser beam; and an amplifier assembly operable to receive the second split pump laser beam and the seed laser beam. The amplifier assembly may include one or more amplifiers arranged in series in a multi-stage configuration, arranged in a multi-pass configuration, or a combination thereof.
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公开(公告)号：US11799263B2
公开(公告)日：2023-10-24
申请号：US16624574
申请日：2018-06-13
Applicant: M SQUARED LASERS LIMITED
Inventor： Gareth Thomas Maker , Graeme Peter Alexander Malcolm , Simon Munro
IPC: H01S3/108 , H01S3/08022 , H01S3/08036 , H01S3/081 , H01S3/106 , H01S3/107 , H01S3/16 , H01S3/0941
CPC classification number: H01S3/108 , H01S3/0816 , H01S3/08027 , H01S3/08036 , H01S3/107 , H01S3/1062 , H01S3/1625 , H01S3/1636 , H01S3/0941
Abstract: An electro-optic modulator (EOM) for altering an optical path length of an optical field is described. The EOM comprises first and second Brewster-angle cut nonlinear crystals having a first and second optical axis. The optical axes are orientated relative to each other such that when an optical field propagates through the nonlinear crystals it experiences no overall deviation. The nonlinear crystals are also arranged to be opposite handed relative to the optical field. The EOM has the advantage that its optical losses are lower when compared with those EOMs known in the art. In addition, the EOM can be inserted into, or removed from, an optical system without any deviation being imparted onto the optical field. This reduces the levels of skill and effort required on the part of an operator. The described method and apparatus for mounting the nonlinear crystals also suppresses problematic piezo-electric resonances within the nonlinear crystals.
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9.发明授权公开(公告)号：US11670904B2
公开(公告)日：2023-06-06
申请号：US17367264
申请日：2021-07-02
Applicant: TIANJIN UNIVERSITY
Inventor： Wei Shi , Chaodu Shi , Hao Tian , Quan Sheng , Jianquan Yao
IPC: H01S3/00 , H01S3/23 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/106 , H01S3/107 , H01S3/11 , H01S3/16
CPC classification number: H01S3/2308 , H01S3/0085 , H01S3/06716 , H01S3/06733 , H01S3/06754 , H01S3/06758 , H01S3/0941 , H01S3/094065 , H01S3/094069 , H01S3/107 , H01S3/1068 , H01S3/11 , H01S3/1618 , H01S2301/08
Abstract: The present invention discloses a high-peak-power single-frequency narrow-linewidth nanosecond fiber laser based on a triangular pulse, wherein the laser includes: pulsed laser generated by the laser seed injecting into a first power pre-amplifier through a first isolator, and then injecting into a second pre-amplifier and then injecting into a power amplifier; wherein triangle-shaped pulsed laser with fast rising edge is obtained by using electro-optic and acousto-optic modulator to modulate continuous wave single-frequency laser or a single-frequency semiconductor laser directly modulated by radio frequency signal; single-frequency triangle-shaped pulsed laser is employed as the laser source according to the characteristics of narrow intrinsic linewidth and suppression of linewidth broadening caused by SPM, and the power of pulsed laser is amplified through the MOPA system.
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公开(公告)号：US20230163556A1
公开(公告)日：2023-05-25
申请号：US17969646
申请日：2022-10-19
Applicant: The University of British Columbia
Inventor： Hossam Ahmed Sabri SHOMAN , Sudip SHEKHAR , Lukas CHROSTOWSKI , Omid ESMAEELI
CPC classification number: H01S3/1305 , H01S3/1062 , H01S3/086
Abstract: An integrated optical linewidth reduction system based on optical feedback and a low-speed electronic control loop to control the optical feedback. Light is tapped and reflected back to the laser with an amplitude, phase or both amplitude and phase adjustment such that the linewidth of the laser is lower than the free-running laser linewidth. The amplitude of the feedback signal may be controlled using an optical attenuator. The phase of the feedback signal may be controlled using a phase shifter. The amplitude of the optical feedback may be monitored by means of a filter and a photodetector, or just a photodetector. The amplitude and/or phase of the optical feedback is monitored by means of a frequency/phase noise discriminator. The phase shifter can be an endless phase shifter
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