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公开(公告)号：US20230051475A1
公开(公告)日：2023-02-16
申请号：US17451742
申请日：2021-10-21
发明人： Mikhail DOLGANOV , Lijun ZHU , Sean BURNS , Yuanzhen ZHUANG
摘要： A driver circuit may include an optical emitter, a capacitive element, and an inductive element. The driver circuit may include a first switch that, in a closed state, is to cause charging of the inductive element, and when transitioning from the closed state to an open state is to cause discharging of the inductive element to charge the capacitive element. The driver circuit may include a second switch that in a closed state is to cause discharging of the capacitive element to provide an electrical pulse to the optical emitter. The driver circuit may include a signal generator configured to generate a first signal for controlling the open state and the closed state of the first switch, and a pulse shortening element configured to shorten a pulse width of the first signal to generate a second signal for controlling the open state and the closed state of the second switch.
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公开(公告)号：US20230034097A1
公开(公告)日：2023-02-02
申请号：US17453441
申请日：2021-11-03
IPC分类号： G02F1/365
摘要： In some implementations, a monolithic optical fiber may comprise a tapered core having a first diameter at an input end and a second diameter at an output end. The tapered core may comprise a first tapered region at the input end, a second tapered region at the output end, and a central region having a constant diameter that is larger than the first diameter and the second diameter. The first tapered region expands monotonically from the first diameter to the constant diameter of the central region along a length of the first tapered region, and the second tapered region contracts monotonically from the constant diameter of the central region to the second diameter along a length of the second tapered region. The monolithic optical fiber may be used as a delivery fiber to deliver a laser beam from a fiber laser engine to a process head.
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公开(公告)号：US20230025759A1
公开(公告)日：2023-01-26
申请号：US17526827
申请日：2021-11-15
摘要： In some implementations, an optical assembly comprises an optical cavity; one or more detectors; and an optical component having an input face and an output face configured to receive an input beam to the input face and to produce one or more primary output beams, and a plurality of secondary output beams from the output face, the secondary output beams resulting from multiple internal reflections within the optical component. At least one of the input face is not perpendicular to the input beam or the output face is not perpendicular to the one or more primary output beams. Each primary output beam is transmitted through the optical cavity perpendicular to at least one surface of the optical cavity, and directed to a respective one of the one or more detectors. Each detector is arranged to exclude at least a portion of each secondary output beam.
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公开(公告)号：US20220385033A1
公开(公告)日：2022-12-01
申请号：US17445786
申请日：2021-08-24
发明人： Wei SHI , Hao HUANG , Siu Kwan CHEUNG , Huanlin ZHU , Lijun ZHU
IPC分类号： H01S5/024 , H01L23/373 , H01L23/498 , H01S5/02315
摘要： A substrate may include a thermally conductive metal core having a top side and a bottom side, a first dielectric coating on the top side of the metal core, a second dielectric coating on the bottom side of the metal core, a first metal circuit layer formed above the first dielectric coating, and a second metal circuit layer formed under the second dielectric coating. In some implementations, the first dielectric coating and the second dielectric coating have thicknesses below sixty micrometers and respective thermal resistances under fifteen degrees Celsius per watt. In some implementations, one or more electrical currents flowing vertically across a dielectric coating have a low parasitic inductance based on the thickness of the dielectric coating, and the metal core may dissipate heat flowing across the dielectric coating and into the metal core.
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公开(公告)号：US20220365358A1
公开(公告)日：2022-11-17
申请号：US17449392
申请日：2021-09-29
摘要： An optical assembly includes an optical cavity; an output detector; a reference detector; and a plate beam splitter, wherein the plate beam splitter has a first face and a second face, and is configured to form, from an input beam: a first output beam, that passes through the optical cavity and impinges the output detector, a first reference beam that impinges on the reference detector, a second output beam parallel to the first output beam, and a second reference beam parallel to the first reference beam; one of the first output beam or the first reference beam is a reflection of the input beam in the first face of the plate beam splitter; the output detector is configured to exclude at least a portion of the second output beam; and the reference detector is configured to exclude at least a portion of the second reference beam.
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公开(公告)号：US11502480B2
公开(公告)日：2022-11-15
申请号：US17032787
申请日：2020-09-25
发明人： Shibnath Pathak , Duanhua Kong , Michael C. Larson , Amit Mizrahi
摘要： In some implementations, a thermally-controlled photonic structure may include a suspended region that is suspended over a substrate; a plurality of bridge elements connected to the suspended region and configured to suspend the suspended region over the substrate, where a plurality of openings are defined between the plurality of bridge elements; and at least one heater element having a modulated width disposed on the suspended region. The at least one heater element having the modulated width may include at least one section of a greater width and at least one section of a lesser width. The at least one section of the greater width may be in alignment with an opening of the plurality of openings and the at least one section of the lesser width may be in alignment with a bridge element of the plurality of bridge elements.
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公开(公告)号：US20220359450A1
公开(公告)日：2022-11-10
申请号：US17814004
申请日：2022-07-21
发明人： Zhengwei SHI , Lijun ZHU , Jihua DU
摘要： A die attachment material may include an ultra-violet (UV) curable resin and silver particles to attach a chip to a submount, where the silver particles are positioned within the UV curable resin. A method may include heating the die attachment material to obtain the UV curable resin on sintered silver particles, where at least a portion of the die attachment material is position between a chip and a submount. The method may further include irradiating, with UV light, the UV curable resin to obtain a polymer on the sintered silver particles. The polymer may form a layer on the sintered silver particles.
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公开(公告)号：US20220344910A1
公开(公告)日：2022-10-27
申请号：US17305484
申请日：2021-07-08
摘要： In some implementations, an optical device (e.g., a monolithic master oscillator power amplifier (MOPA) diode) may include a first facet, one or more gratings, an amplifier structure terminated with a second facet, and an oscillator array that includes multiple singlemode oscillators coupled to the first facet and to the one or more gratings. In some implementations, the multiple singlemode oscillators may be configured to generate multiple seed beams and to transmit the multiple seed beams into the amplifier structure through the one or more gratings.
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公开(公告)号：US20220344909A1
公开(公告)日：2022-10-27
申请号：US17538592
申请日：2021-11-30
发明人： Yeyu ZHU , Eric R. HEGBLOM , Yuefa LI
摘要： In some implementations, a vertical cavity surface emitting laser (VCSEL) array may include a substrate. In some implementations, the VCSEL array may include a set of cathodes disposed on the substrate in a first direction, wherein a cathode, of the set of cathodes, is defined by a serpentine shape. In some implementations, the VCSEL array may include a set of anodes disposed on the substrate in a second direction, wherein an anode, of the set of anodes, is defined by the serpentine shape.
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公开(公告)号：US20220326458A1
公开(公告)日：2022-10-13
申请号：US17357274
申请日：2021-06-24
发明人： Roozbeh AHMADI , Nenad DURICIC , Shane H. WOODSIDE , Doug CROSS , Andrew TELFORD
摘要： An opto-mechanical assembly includes a first thermal control element disposed on a region of a first section of an enclosure; a second thermal control element disposed on a region of a second section of the enclosure; and an optical element that includes a first portion and a second portion. The first thermal control element is configured to heat the first portion of the optical element and to cause the first portion of the optical element to be associated with a first temperature, and the second thermal control element is configured to heat the second portion of the optical element and to cause the second portion of the optical element to be associated with a second temperature. This causes a difference between the first temperature and the second temperature to satisfy a temperature difference threshold. Accordingly, this also causes a temperature gradient along an axis of the optical element to satisfy a temperature gradient threshold.
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