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1. 发明授权

US11604399B2 Back-conversion suppressed optical parametric amplification 有权
公开(公告)号：US11604399B2
公开(公告)日：2023-03-14
申请号：US17754475
申请日：2020-10-05
申请人： Cornell University
发明人： Jeffrey Moses , Noah Flemens , Nicolas Swenson
IPC分类号： G02F1/39 , G02F1/35 , H01S3/131 , H01S3/108 , H01S3/00
摘要： In one aspect, a device is disclosed that includes one or more input ports structured to receive a pumping light at a pumping wavelength and a signal light at a signal wavelength, and one or more output ports structured to output light including an amplified signal light at the signal wavelength and a second harmonic idler light. The device includes a nonlinear optical material to mix the pumping light and the signal light and to cause nonlinear conversion of the pumping light into the amplified signal light and generate an idler light at an idler wavelength. The nonlinear optical material is further structured to convert the idler light into the second harmonic idler light which eliminates the idler light at the one or more output ports and prevents back-conversion of the amplified signal light and idler light to the pumping wavelength.

2. 发明授权

US11467469B1 Hybrid material optical parametric amplifier 有权
公开(公告)号：US11467469B1
公开(公告)日：2022-10-11
申请号：US17207384
申请日：2021-03-19
申请人： Raytheon Company
发明人： Robert D. Stultz , Todd O. Clatterbuck , Aleksandr S. Radunsky , Aaron B. Potter , Katherine V. Palombo
IPC分类号： G02F1/35 , G02F1/39 , G02F1/355
摘要： An apparatus includes a plurality of front-end nonlinear optical crystals and a plurality of back-end nonlinear optical crystals. The front-end nonlinear optical crystals are arranged in a chain and are configured to amplify a received signal. The back-end nonlinear optical crystals are arranged in the chain after the front-end nonlinear optical crystals and are configured to further amplify the received signal and generate an amplified signal. The back-end nonlinear optical crystals are made from a different nonlinear optical crystal than the front-end nonlinear optical crystals.

3. 发明申请

US20220317544A1 MULTIPLEXED SINGLE PHOTON SOURCE USING ONE-WAY SWITCHING ELEMENTS 有权
公开(公告)号：US20220317544A1
公开(公告)日：2022-10-06
申请号：US17708123
申请日：2022-03-30
申请人： Michele Reilly
发明人： Michele Reilly
IPC分类号： G02F1/39 , H04Q11/00 , H04B10/70
摘要： A multiplexed single photon source for quasi-deterministically generating single photons, wherein heralded random single photons generated by pulsed random single photon source are sent through a series of optical switches each having first and second input and output modes and each capable of being switched from a first state corresponding to a SWAP operation to a second state corresponding to an Identity operation on the mode space, whereby the first and second input and output modes of the switches are connected in series to form a first and second optical path respectively, and whereby a first output mode of a last optical switch forms the output mode of the multiplexed single photon source and a second output mode of the last optical switch is connected by a delay loop introducing a time delay Td to the second input mode of a first optical switch. It furthermore relates to a method of quasi-deterministically generating single photons with such a multiplexed single photon source, the method comprising initializing, before or at the start of a first cycle, the first switch in the first state and all subsequent switches in the second state; switching, when the generation of a random single photon is heralded, the first switch to the second state after that photon has been routed onto the closed optical path formed by the second optical path and the delay loop, thereby ensuring that the photon may loop around the closed optical path; and, switching, at the start of the Nth cycle, a last switch of the series of optical switches into the first state, thereby causing the photon to be routed out of the closed optical path and into the output mode of the multiplexed single photon source, such that the photon is output quasi-deterministically at a time N Td after the start of the first cycle.

4. 发明授权

US11462880B2 Distributed pulsed light amplifier based on optical fiber parameter amplification, and amplification and performance characterization method 有权
公开(公告)号：US11462880B2
公开(公告)日：2022-10-04
申请号：US17583285
申请日：2022-01-25
申请人： Wuhan University of Technology
发明人： Zhengying Li , Xuelei Fu , Ben Xiong , Zhou Zheng
IPC分类号： H01S3/10 , G01M11/00 , G02F1/39 , H01S3/094 , H01S3/30
摘要： The present invention discloses a distributed pulsed light amplifier based on optical fiber parametric amplification, comprising a pump pulsed light source, a sensing pulsed light source, a synchronization device, a two-in-one optical coupler, an optical circulator, a parametric amplification optical fiber, a first optical filter, a photoelectric detector and a signal acquisition device. According to the distributed pulsed light amplifier, high-power pulsed light is used as pump light to generate an optical fiber parametric amplification effect near a zero-dispersion wavelength of an optical fiber, thereby amplifying a power of another sensing pulsed light. Meanwhile, due to the fact that effective optical fiber parametric amplification cannot be achieved through low-power light leakage outside a duration interval of the pump pulsed light, leaked light from the sensing pulsed light cannot be amplified, and the effect of amplifying a pulse extinction ratio can be achieved at the same time.

5. 发明授权

US11448938B2 Entangled photon source that can replace a pulsed laser in non-ablative multiphoton and nonlinear processes 有权
公开(公告)号：US11448938B2
公开(公告)日：2022-09-20
申请号：US17110599
申请日：2020-12-03
申请人： California Institute of Technology
发明人： Scott K. Cushing , Szilard Szoke , Manni He , Bryce P. Hickam
IPC分类号： G02F1/39 , G01N21/31 , G01N21/64 , G01J3/42
摘要： A coherent, entangled photon source which uses a continuous wave laser to replace pulsed photon excitation sources in multiphoton nonlinear processes. In various embodiments, the device comprises a continuous wave photon laser creating electromagnetic radiation at a specific frequency and narrow linewidth. The emitted beam may be conditioned by an optical fiber to allow for efficient interaction with a nonlinear crystal. The nonlinear material is designed and fabricated in a specific manner, enabling the quantum mechanical process of a single photon with well-defined energy being converted into two or more photons which display quantum correlations. The nonlinear material and subsequent fiber-optic or free space components control the temporal, spatial, and polarization-related quantum correlations such that the entangled photons can create a signal in multiphoton nonlinear processes that is the same or exceeds that of a pulsed photon source but at the average and peak powers of a continuous wave laser.

6. 发明申请

US20220291568A1 Phase Synchronization Method and Phase Synchronization Device 有权
公开(公告)号：US20220291568A1
公开(公告)日：2022-09-15
申请号：US17637358
申请日：2019-08-28
申请人： Nippon Telegraph and Telephone Corporation
发明人： Takuya Ikuta , Takahiro Inagaki , Kensuke Inaba , Toshimori Honjo , Hiroki Takesue
IPC分类号： G02F1/39 , G02F2/00 , G02F3/00
摘要： The present invention provides an optical phase synchronization method characterized by involving applying a small phase modulation signal (dither signal) to local oscillator light, acquiring an error signal that is dependent on a phase shift, and controlling the phase shift. The present invention further provides an optical phase synchronization method characterized by involving inducing a specific phase pattern in dummy pulses in an optical resonator using injection light, applying phase modulation to the local oscillator light, and thereby acquiring a part of the measurement result of the dummy pulses as the error signal. The present invention is further characterized by arranging calculation pulses and phase synchronization dummy pulses in a distributed manner (for example, alternately) and increasing a pulse width using a narrow band electrical filter.

7. 发明授权

US11442335B2 Systems and methods for managing incoherent laser beams 有权
公开(公告)号：US11442335B2
公开(公告)日：2022-09-13
申请号：US16856182
申请日：2020-04-23
申请人： Q.ant GmbH
发明人： Klaus Mantel , Michael Foertsch
IPC分类号： G02F1/39 , G02B27/48 , G02F1/35 , G03B21/20
摘要： A laser light source for producing incoherent laser beams, in particular for speckle-free imaging and/or projection, with at least two different wavelengths, preferably with three different wavelengths, includes: at least two optical devices, in particular at least two optical parametric oscillators, which each have a nonlinear optical medium for respectively producing a signal beam and an idler beam, and a superposition device configured to respectively superpose either the signal beam or the idler beam of each of the at least two optical devices for producing an incoherent laser beam with the at least two different wavelengths. A laser projector for producing an image, in particular a speckle-free image, on a projection surface, can include such a laser light source.

8. 发明申请

US20220197109A1 APPARATUS OF OPTICAL TRANSMITTERS AND RECEIVERS OPERATING IN LONG WAVE INFRARED WAVELENGTH RANGES 有权
公开(公告)号：US20220197109A1
公开(公告)日：2022-06-23
申请号：US17451711
申请日：2021-10-21
申请人： McMaster University
发明人： Chang-qing Xu , Lima Flannigan , Joshua Kneller
IPC分类号： G02F1/39 , G02F1/35 , H01S3/109 , H01S3/06 , H01S3/23 , H01S3/0941 , H01S3/00 , H04B10/50
摘要： Optical transmitters and optical receivers utilizing long wave infrared light for use with an earth-orbiting satellite communication system, and a structure including an intracavity optical nonlinear process, are described herein. The transmitters include a pumping laser diode with a fast-axis collimating lens and a pumping wavelength λ0, operating in a continuous wavelength (CW) mode. The transmitters also include a laser cavity having a beam combiner or a dichroic mirror, a laser crystal with a lasing wavelength λ1 and a difference frequency generation orientation patterned semiconductor to generate long wave-IR light. The transmitters also include a second laser at a wavelength λ2, operating in a modulation mode. The receivers have a similar structure to the transmitters, utilizing a sum frequency generation orientation patterned semiconductor to convert long wave-IR light into the short wave-IR.

9. 发明申请

US20220107545A1 OPTICAL WAVEGUIDE STRUCTURE WITH TRIPLE PARTIALLY OVERLAPPING LOOPS 有权
公开(公告)号：US20220107545A1
公开(公告)日：2022-04-07
申请号：US17450031
申请日：2021-10-05
申请人： The Boeing Company
发明人： Daniel Yap , Shuoqin Wang , Ivan Alvarado , Biqin Huang , Thaddeus Ladd
IPC分类号： G02F1/365 , G02F1/35 , G02F1/39
摘要： A method, apparatus, and system for non-linear optical process. A first light of a first wavelength is routed in a first loop in a main nonlinear optical waveguide. The first loop has a first length for the first light of the first wavelength. A second light of a second wavelength is routed in a second loop that includes portions of the main nonlinear optical waveguide and a first extension optical waveguide. The second loop has a second length for the second light of the second wavelength. A third light of a third wavelength is routed in a third loop that include portions of the main nonlinear optical waveguide and a second extension optical waveguide. The third loop has a third length for the third light of the third wavelength.

10. 发明申请

US20220066283A1 HIGH POWER LASER CONVERTER BASED ON PATTERNED SRB4B07 OR PBB407 CRYSTAL 有权
公开(公告)号：US20220066283A1
公开(公告)日：2022-03-03
申请号：US17415090
申请日：2019-12-18
申请人： IPG PHOTONICS CORPORATION
发明人： Valentin GAPONTSEV , Aleksander CHEREPAKHIN , Anatolii ZAMKOV , Nikolay EVTIKHIEV , Dan PERLOV , Aleksander ZAYTSEV , Andrey SADOVSKIY , Nikita RADIONOV
IPC分类号： G02F1/355 , G02F1/39 , H01S3/23 , H01S3/11 , H01S3/00 , G02F1/37
摘要： The disclosed laser system is configured with a laser source outputting light at a fundamental frequency. The output light is incident on a frequency converter operative to convert the fundamental frequency to a higher harmonic including at least one frequency converting stage. The frequency converter is based on a SrB4O7 (SBO) or PbB4O7 (PBO) nonlinear crystal configured with a plurality of domains. The domains have periodically alternating polarity of the crystal axis enabling a QPM use and formed with each with highly parallel walls which deviate from one another less than 1 micron over a 10 mm distance.

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