-
公开(公告)号：US20240332892A1
公开(公告)日：2024-10-03
申请号：US18580729
申请日：2022-03-08
发明人： TOMOKI ONO
IPC分类号： H01S5/06 , G01S7/484 , G01S7/499 , G01S17/931 , H01S5/00
CPC分类号： H01S5/0601 , G01S7/484 , G01S7/499 , G01S17/931 , H01S5/0071 , H01S5/0615 , H01S2301/02
摘要： For example, an influence of a tail in a laser pulse is reduced. A semiconductor laser includes at least two or more gain regions and at least two or more absorption regions formed on a semiconductor substrate, in which the gain regions and the absorption regions include a continuous active layer, and the gain regions and the absorption regions are alternately formed via a separation region, and from a front end surface, a first laser pulse having a first polarized light is emitted and a second laser pulse having a second polarized light is subsequently emitted, and the first polarized light and the second polarized light are orthogonal to each other.
-
公开(公告)号：US20240297477A1
公开(公告)日：2024-09-05
申请号：US18116365
申请日：2023-03-02
发明人： Jiann-Chang Lo , Vinson Mar
IPC分类号： H01S5/00 , H01S5/024 , H01S5/06 , H01S5/0687
CPC分类号： H01S5/0078 , H01S5/02415 , H01S5/0612 , H01S5/0687
摘要： A tunable distributed feedback (DFB) laser unit comprises:
a thermo-electric cooler;
a tunable DFB laser diode; and
an optical filter chip comprising:
a tunable optical filter;
a first optical splitter with an optical tap and an output path, and
a first photodetector configured to receive light from the optical tap from the first optical splitter and to monitor output intensity from the tunable optical filter;
wherein the tunable DFB laser diode is supported on the thermo-electric cooler and wherein the light from the tunable laser diode or a fraction thereof is directed through the tunable optical filter.
The tunable DFB laser unit can be used in a method for wavelength locking the DFB laser.-
公开(公告)号：US12072351B1
公开(公告)日：2024-08-27
申请号：US16954000
申请日：2020-11-20
CPC分类号： G01Q60/06 , C12Q1/6869 , G01N21/65 , H01S5/0601 , H01S5/3402 , H01S5/343
摘要： A new integrated III-V/silicon Atomic Force Microscopy (AFM) active optical probe integrates a III-V semiconductor laser source and a silicon cantilever AFM probe into a robust easy-to-use single III-V/silicon chip to enable AFM measurements, optical imaging, and spectroscopy at the nanoscale.
-
公开(公告)号：US12051885B2
公开(公告)日：2024-07-30
申请号：US17415014
申请日：2019-12-26
发明人： Feng Gao , Lianxi Jia , Guo Qiang Patrick Lo
CPC分类号： H01S5/1228 , H01S5/021 , H01S5/0215 , H01S5/026 , H01S5/04253 , H01S5/0612 , H01S5/12
摘要： A distributed feedback laser integrated on silicon comprising a combination of a waveguide of a first material and a laser diode a second material, different from the first material, wherein the laser diode comprises a plurality of regularly spaced metalized grating elements which form a single longitudinal mode; wherein the waveguide comprises a plurality of waveguide elements separated by metalized regions; and wherein the metalized grating elements and the metalized regions are adapted to be coupled to one another to form the distributed feedback laser.
-
公开(公告)号：US12046875B2
公开(公告)日：2024-07-23
申请号：US17313389
申请日：2021-05-06
CPC分类号： H01S5/3401 , H01S5/0425 , H01S5/0604 , H01S5/3086 , H01S5/3402 , H01S5/0287 , H01S5/04257 , H01S5/12 , H01S5/22 , H01S2302/02
摘要： A quantum cascade laser device includes a semiconductor substrate, an active layer provided on the semiconductor substrate, and an upper clad layer provided on a side of the active layer opposite to the semiconductor substrate side and having a doping concentration of impurities of less than 1×1017 cm−3. Unit laminates included in the active layer each include a first emission upper level, a second emission upper level, and at least one emission lower level in their subband level structure. The active layer is configured to generate light having a center wavelength of 10 μm or more due to electron transition between at least two levels of the first emission upper level, the second emission upper level, and the at least one emission lower level in the light emission layer in each of the unit laminates.
-
公开(公告)号：US20240170916A1
公开(公告)日：2024-05-23
申请号：US18551568
申请日：2021-05-07
IPC分类号： H01S5/0683 , H01S5/06 , H01S5/068
CPC分类号： H01S5/06837 , H01S5/0612 , H01S5/06804
摘要： A method and an apparatus for controlling a wavelength of an optical module, and a storage medium. The method comprises: determining an initial temperature compensation curve corresponding to a transmitter optical subassembly TOSA in an optical module (S101); obtaining a first control voltage to be applied to a TEC according to a current ambient temperature and the initial temperature compensation curve; and controlling the TOSA to emit a first light wave based on the first control voltage, whose wavelength is a first wavelength (S102); when the first wavelength does not meet a setting range, adjusting the control voltage applied to the TEC until the control voltage applied to the TEC reaches a second control voltage, the second control voltage being capable of controlling the TOSA to emit a second light wave at the current ambient temperature, whose wavelength is a second wavelength meeting the setting range; and updating the initial temperature compensation curve based on the second control voltage (S103).
-
公开(公告)号：US20240162677A1
公开(公告)日：2024-05-16
申请号：US18055452
申请日：2022-11-15
申请人： Vector Atomic, Inc.
CPC分类号： H01S3/2391 , H01S3/10092 , H01S5/0617
摘要： Embodiments herein describe using a reference laser locked to an atomic reference to adjust the wavelength of a seed laser. A frequency adjuster (e.g., a frequency doubler) can adjust the seed laser to a different wavelength/frequency for a particular application. A controller can adjust the wavelength of the seed laser by comparing the reference laser to the adjusted seed laser generated by the frequency adjuster.
-
公开(公告)号：US11927839B2
公开(公告)日：2024-03-12
申请号：US17019706
申请日：2020-09-14
申请人： II-VI Delaware, Inc.
发明人： Andrei Kaikkonen , David Adams , Robert Lewen , Nicolae Chitica
CPC分类号： G02F1/025 , H01S5/0601 , G02F1/0157 , G02F2202/101 , G02F2202/102 , G02F2202/108
摘要： An electro-absorption modulator (EAM) is configured to include an on-chip AC ground plane that is used to terminate the high frequency RF input signal within the chip itself. This on-chip ground termination of the modulation input signal improves the frequency response of the EAM, which is an important feature when the EAM needs to support data rates in excess of 50 Gbd. By virtue of using an on-chip ground for the very high frequency signal content, it is possible to use less expensive off-chip components to address the lower frequency range of the data signal (i.e., for frequencies less than about 1 GHz).
-
公开(公告)号：US20240079851A1
公开(公告)日：2024-03-07
申请号：US17929880
申请日：2022-09-06
申请人： Google LLC
CPC分类号： H01S5/068 , G02B26/101 , H01S5/0071 , H01S5/0617 , H01S5/062 , H01S5/40
摘要： A laser display may include a light engine, which includes a laser diode and a temperature sensor configured to measure a temperature of the laser diode. The light engine may be coupled to a controller configured to determine a drive current for the laser diode to generate an optical power based on a threshold of the laser diode and an efficiency of the laser diode. The controller is configured to calculate the threshold and the efficiency of the laser diode at the measured temperature using a threshold model and an efficiency model of the laser diode, which are generated using a calibration process.
-
10.发明授权公开(公告)号：US11923659B2
公开(公告)日：2024-03-05
申请号：US16991086
申请日：2020-08-12
IPC分类号： H01S5/06 , H01S5/00 , H01S5/024 , H01S5/0687 , H04B10/50 , H04B10/572
CPC分类号： H01S5/0612 , H01S5/0078 , H01S5/02407 , H01S5/0687 , H04B10/503 , H04B10/572
摘要： A method for controlling a wavelength of an optical module, includes: a laser light source unit emitting a laser beam; a wavelength filter having a periodical transmission characteristic with respect to a wavelength of light; a temperature controller on which the wavelength filter is placed and that adjusting a temperature of the wavelength filter; a heat generating body placed on the temperature controller; and a control device controlling the wavelength of the laser beam emitted from the laser light source unit and control the transmission characteristic of the wavelength filter based on an intensity of the laser beam transmitted through the wavelength filter, the method including changing at least one of a target value of the wavelength control of the laser beam and a target value of the control of the wavelength filter based on a current value of the heat generating body.
-
-
-
-
-
-
-
-
-
搜索结果
1845 条记录 (耗时 0.024 秒)
