-
公开(公告)号：US20240356296A1
公开(公告)日：2024-10-24
申请号：US18756512
申请日：2024-06-27
发明人： Jian CHEN , Chang XIAO , Xia HONG , Fangdong ZHAO
CPC分类号： H01S3/063 , G02B6/12019 , G02B6/4204 , H01S3/1022
摘要： In some implementations, an optical isolator core includes a Faraday rotator and a plurality of birefringent crystal plates. The plurality of birefringent crystal plates may include a first birefringent crystal plate to separate input light into light having a first polarization and light having a second polarization, and a second birefringent crystal plate to combine the light having the first polarization and the light having the second polarization in output light that is laterally displaced by the single stage optical isolator. The Faraday rotator may be provided between the first birefringent crystal plate and the second birefringent crystal plate. In some implementations, the plurality of birefringent crystal plates further include a third birefringent crystal plate provided between the Faraday rotator and the second birefringent crystal plate. Additionally, or alternatively, the optical isolator core may further include a half-wave plate arranged between the Faraday rotator and the first birefringent crystal plate.
-
公开(公告)号：US12119608B2
公开(公告)日：2024-10-15
申请号：US17419479
申请日：2019-12-26
摘要： A wavelength tunable laser includes a filter region having a wavelength selection function on light from a gain region, wherein the filter region is a Sagnac interferometer and includes two ring resonators. The ring resonator has two optical couplers, and first and second curved waveguides connecting the two optical couplers, each of the two optical couplers is configured to receive input of the light from the gain region through an input-output port, to couple light of a resonant peak to a bar port of the input-output port, and to couple light except light at a resonant peak wavelength to a cross port of the input-output port, and each of radiation waveguides connected to the cross ports of the input-output ports of the two optical couplers has a structure that radiates the light except the light at the resonant peak wavelength to a front surface or a back surface of a substrate.
-
公开(公告)号：US11652330B1
公开(公告)日：2023-05-16
申请号：US17098577
申请日：2020-11-16
CPC分类号： H01S3/30 , H01S3/0637 , H01S3/091 , H01S3/2308
摘要： An optical amplifier device employing a Mach-Zehnder Interferometer (MZI) that reduces the amount of residual pump power in the optical output of the amplifier is disclosed. The MZI amplifier employs two geometrically linear optical amplifier arms or two multi-spatial-mode racetrack optical amplifiers to amplify a signal with a pumping beam, with the signal output port having extremely low levels of residual pump power. The MZI optical amplifier is a silicon photonic integrated circuit, with all optical amplifiers, couplers, phase shifters, and optical attenuators formed of silicon photonic integrated circuit elements. The MZI optical amplifier may include one, two, or three MZI stages, and multiple MZI optical amplifiers may be used in parallel or sequentially to achieve higher overall signal gain or power. The MZI optical amplifier may employ Brillouin-scattering-based amplifiers, Raman-based integrated waveguide optical amplifiers, or Erbium-doped integrated waveguide optical amplifiers.
-
公开(公告)号：US11641090B2
公开(公告)日：2023-05-02
申请号：US16947109
申请日：2020-07-17
申请人： Raytheon Company
发明人： Aaron B. Potter , Kalin Spariosu
摘要： A system includes a planar waveguide that includes an active gain medium configured to receive pump light from a pump source and amplify stimulated emission light. The planar waveguide has a fast axis and a slow axis and is configured to operate in single mode in the fast axis and multimode in the slow axis. The system also includes a hybrid spatial filter configured to receive the amplified stimulated emission light from the planar waveguide and output laser light. The hybrid spatial filter includes a physical slit having a narrower dimension corresponding to the slow axis of the planar waveguide. The physical slit is configured to reduce an intensity of the amplified stimulated emission light received from the planar waveguide. The hybrid spatial filter also includes a Volume Bragg Grating (VBG) configured to constrain an angle of the amplified stimulated emission light and enable compact geometry intra-cavity beam expanding/collimating optics.
-
公开(公告)号：US20220320813A1
公开(公告)日：2022-10-06
申请号：US17616044
申请日：2019-06-05
发明人： Suguru Yamaoka , Ryo Nakao , Takaaki Kakitsuka , Shinji Matsuo
摘要： There are provided a first cladding layer formed on a Si substrate, a first core made of Si and formed on the first cladding layer, and a second cladding layer formed on the first cladding layer and covering the first core Additionally, this optical device includes a waveguide type laser formed over the second cladding layer, a second core made of InP and formed continuously to the laser, and a third cladding layer formed on the second cladding layer and covering the laser and the second core.
-
公开(公告)号：US11367998B2
公开(公告)日：2022-06-21
申请号：US16762801
申请日：2017-12-15
发明人： Yaping Dan , Huimin Wen , Jiajing He
摘要： A method for preparing an erbium (Er)- or erbium oxygen (Er/O)-doped silicon-based luminescent material emitting a communication band at room temperature. The method comprising the following steps: (a) doping a single crystalline silicon wafer with erbium ion implantation or co-doping the single crystalline silicon wafer with erbium ion and oxygen ion implantation simultaneously to obtain an Er- or Er/O-doped silicon wafer, wherein the single crystalline silicon wafer is a silicon wafer with a germanium epitaxial layer, or an SOI silicon wafer with silicon on an insulating layer or other silicon-based wafers; and (b) subjecting the Er- or Er/O-doped silicon wafer to a deep-cooling annealing treatment, the deep-cooling annealing treatment includes a temperature increasing process and a rapid cooling process.
-
公开(公告)号：US20220123516A1
公开(公告)日：2022-04-21
申请号：US17500425
申请日：2021-10-13
发明人： Qiushi Guo , Alireza Marandi
摘要： A chip-scale mode-locked laser including a cavity including a gain medium for amplifying signal electromagnetic radiation (signal) through stimulated emission, the signal comprising a signal wavelength; and a passive or active mode-locking device to enforce pulse formation in the laser. The mode-locking device includes a thin-film waveguide having a thickness on the order of the signal wavelength so as to confine and guide the signal along the thin-film waveguide, and a material comprising a second-order nonlinear susceptibility to enable active or passive mode-locking of the signal. The mode-locking device leads to generation of pulses of the signal outputted from the mode-locked laser.
-
公开(公告)号：US11300729B2
公开(公告)日：2022-04-12
申请号：US17252788
申请日：2019-06-04
摘要： An active medium piece (109), which has been taken out using a nanoprobe (108), is processed so as to match the shape of a nanoslot (104), and thus an active medium small piece (111) that is smaller than the active medium piece (109) is formed (a fourth step). For example, irradiation with an ion beam (110) is performed so that the active medium piece (109) is shaped (processed) into an active medium small piece (111) that has a three-dimensional shape suitable for being placed in the nanoslot (104). The active medium piece (109) is processed into the active medium small piece (111) in the state of being held by the nanoprobe (108).
-
公开(公告)号：US20220077647A1
公开(公告)日：2022-03-10
申请号：US17419479
申请日：2019-12-26
摘要： A wavelength tunable laser includes a filter region having a wavelength selection function on light from a gain region, wherein the filter region is a Sagnac interferometer and includes two ring resonators. The ring resonator has two optical couplers, and first and second curved waveguides connecting the two optical couplers, each of the two optical couplers is configured to receive input of the light from the gain region through an input-output port, to couple light of a resonant peak to a bar port of the input-output port, and to couple light except light at a resonant peak wavelength to a cross port of the input-output port, and each of radiation waveguides connected to the cross ports of the input-output ports of the two optical couplers has a structure that radiates the light except the light at the resonant peak wavelength to a front surface or a back surface of a substrate.
-
公开(公告)号：US20210288460A1
公开(公告)日：2021-09-16
申请号：US17332632
申请日：2021-05-27
发明人： Yukari MIYAGI , Kenichi HIROSAWA
摘要： A laser amplifier includes a planar optical waveguide for laser amplification, and an input optical system for inputting signal light to a core layer of the planar optical waveguide. The input optical system includes: a collimating lens for converting output light from a signal light source into parallel light; an anamorphic prism for reducing the beam width in a first direction of output light from the collimating lens; and a cylindrical lens for collecting output light from the anamorphic prism in a second direction, and output light from the cylindrical lens is input to the core layer.
-
-
-
-
-
-
-
-
-
搜索结果
531 条记录 (耗时 0.017 秒)
