公开(公告)号：US11885800B2

公开(公告)日：2024-01-30

申请号：US17037162

申请日：2020-09-29

Applicant: IMRA America, Inc.

Inventor： Bing Liu ,  Matthew L. Elani ,  Alison R. Garrett

IPC: G01N33/543 ,  G01N27/74 ,  G01N33/68 ,  G01N33/76 ,  G01N35/00

CPC classification number: G01N33/54333 ,  G01N27/745 ,  G01N33/54326 ,  G01N33/6887 ,  G01N33/76 ,  B01L2200/025 ,  G01N35/0098

Abstract: A system includes an apparatus having at least one permanent magnet and at least one magnetic field sensor at a pole of the at least one permanent magnet and configured to be positioned relative to a surface of a membrane containing immobilized magnetic particles selectively bound to an analyte such that the magnetic particles are magnetized by the at least one permanent magnet. The system further includes a stage configured to move at least one of the apparatus and the membrane relative to one another with an oscillatory movement parallel to the surface of the membrane, at least one controller configured to control the oscillatory movement, and a data acquisition unit configured to receive signals from the at least one magnetic field sensor and the at least one controller method.

公开(公告)号：US20230318253A1

公开(公告)日：2023-10-05

申请号：US18177410

申请日：2023-03-02

Applicant: IMRA America, Inc.

Inventor： Martin E. Fermann ,  Antoine Jean Gilbert Rolland ,  Peng Li

IPC: H01S3/30 ,  H01S3/13 ,  H01S3/0941 ,  H01S3/094 ,  H01S3/10 ,  H01S3/00 ,  H01S3/08

CPC classification number: H01S3/302 ,  H01S3/0085 ,  H01S3/08013 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/1305

Abstract: Example ultra narrow linewidth Brillouin lasers are disclosed that are pumped by pump lasers that are controlled via optimal control schemes in order to stabilize the Brillouin laser output frequency and minimize the Brillouin output linewidth. The control schemes are based on feedback loops to match the pump laser frequency to the optimum Stokes shift on the one hand and to line-narrow the pump laser linewidth on the other hand via comparing the linewidth of the pump laser with the linewidth of the Brillouin laser. The feedback loops in the control schemes can be partially or fully replaced with feedforward control schemes, allowing for larger bandwidth control. Provision for simultaneous oscillation of the Brillouin lasers on two polarization modes allows for further line-narrowing of the Brillouin output. The ultra-narrow linewidth Brillouin lasers can be advantageously implemented as pumps for microresonator based frequency combs, and can also be integrated to the chip scale and be constructed with minimal vibration sensitivity. The ultra-narrow linewidth Brillouin lasers can be widely tuned and a frequency readout can be provided via the use of a frequency comb. When phase locking a frequency comb to the Brillouin laser, ultra-stable microwave generation can be facilitated.

公开(公告)号：US11201447B2

公开(公告)日：2021-12-14

申请号：US16717979

申请日：2019-12-17

Applicant: IMRA AMERICA, INC.

Inventor： Jingzhou Xu ,  Takashi Hori ,  Shigeru Suzuki ,  Gyu Cheon Cho

IPC: H01S3/10 ,  H01S3/00 ,  H01S3/067 ,  G02F1/39 ,  H01S3/109 ,  H01S3/11

Abstract: Chirped pulse amplification (CPA) systems configured to generate and amplify multi-pulses are described. The nonlinear interaction of pulses can generate a multiple pulse pack with a dense time separation between pulses. Reducing or eliminating the nonlinear interaction can be provided by spectrally and/or temporally splitting pulses in the chirped amplification system.

公开(公告)号：US20210294180A1

公开(公告)日：2021-09-23

申请号：US17225012

申请日：2021-04-07

Applicant: IMRA America, Inc.

Inventor： Naoya Kuse ,  Martin E. Fermann ,  Tomohiro Tetsumoto ,  Antoine Jean Gilbert Rolland

IPC: G02F1/35 ,  G01S7/481

Abstract: Systems and methods for precision control of microresonator (MR) based frequency combs can implement optimized MR actuators or MR modulators to control long-term locking of carrier envelope offset frequency, repetition rate, or resonance offset frequency of the MR. MR modulators can also be used for amplitude noise control. MR parameters can be locked to external reference frequencies such as a continuous wave laser or a microwave reference. MR parameters can be selected to reduce cross talk between the MR parameters, facilitating long-term locking. The MR can be locked to an external two wavelength delayed self-heterodyne interferometer for low noise microwave generation. An MR-based frequency comb can be tuned by a substantial fraction or more of the free spectral range (FSR) via a feedback control system. Scanning MR frequency combs can be applied to dead-zone free spectroscopy, multi-wavelength LIDAR, high precision optical clocks, or low phase noise microwave sources.

公开(公告)号：US11121519B2

公开(公告)日：2021-09-14

申请号：US16218065

申请日：2018-12-12

Applicant: IMRA America, Inc.

Inventor： Kevin F. Lee ,  Martin E. Fermann

IPC: H01S3/067 ,  H01S3/00 ,  H01S3/23 ,  H01S3/10 ,  H01S3/13 ,  H01S3/094 ,  H01S3/08

Abstract: In an example amplifier system, an input pulse train is passed through an optical stage that splits each pulse into two or more pulses. These divided pulses are then injected into at least two amplifiers for amplification. The amplified pulses are subsequently passed back through the same optical stage in order to combine the pulses back into one high energy pulse. The amplifier system can use time division multiplexing (TDM) and/or spatial division multiplexing (SDM) to produce, e.g., four pulses in conjunction with two amplifiers and propagation through two optical beam splitters, which are coherently combined into a single output pulse after amplification. The amplifiers can comprise fiber amplifiers or bulk amplifiers.

公开(公告)号：US10147987B2

公开(公告)日：2018-12-04

申请号：US15042350

申请日：2016-02-12

Applicant: IMRA AMERICA, INC.

Inventor： Bing Tan ,  Zhendong Hu ,  Yong Che

IPC: H01M12/02 ,  H01G11/02 ,  H01G11/06 ,  H01G11/46 ,  H01G11/54 ,  H01M4/90 ,  H01M12/08 ,  H01M16/00 ,  H01M4/86 ,  H01M14/00

Abstract: A rechargeable energy storage device is disclosed. In at least one embodiment the energy storage device includes an air electrode providing an electrochemical process comprising reduction and evolution of oxygen and a capacitive electrode enables an electrode process consisting of non-faradic reactions based on ion absorption/desorption and/or faradic reactions. This rechargeable energy storage device is a hybrid system of fuel cells and ultra-capacitors, pseudo-capacitors, and/or secondary batteries.

公开(公告)号：US10096962B2

公开(公告)日：2018-10-09

申请号：US14716369

申请日：2015-05-19

Applicant: IMRA AMERICA, INC.

Inventor： Martin E. Fermann

IPC: H01S3/00 ,  H01S3/13 ,  H01S3/067 ,  H01S3/23 ,  H01S3/16 ,  H01S3/094 ,  H01S3/108 ,  H01S3/30

Abstract: By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, a low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained.

公开(公告)号：US10067289B2

公开(公告)日：2018-09-04

申请号：US15593638

申请日：2017-05-12

Applicant: IMRA America, Inc.

Inventor： Liang Dong ,  William Wong ,  Martin E. Fermann

IPC: G02B6/26 ,  G02B6/02 ,  G02B6/32 ,  H01S3/00 ,  H01S3/067 ,  H01S3/23 ,  G02B6/024 ,  G02F1/01 ,  G02B6/036 ,  H01S3/094 ,  G02B6/24 ,  G02B6/00 ,  H01S3/02 ,  H01S3/30 ,  H01S3/16

CPC classification number: G02B6/02357 ,  G02B6/00 ,  G02B6/02 ,  G02B6/02009 ,  G02B6/02033 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/024 ,  G02B6/036 ,  G02B6/03633 ,  G02B6/03694 ,  G02B6/24 ,  G02B6/26 ,  G02B6/262 ,  G02B6/32 ,  G02F1/0134 ,  H01S3/0057 ,  H01S3/02 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/1618 ,  H01S3/2308 ,  H01S3/302 ,  H01S2302/00

Abstract: Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprise cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

公开(公告)号：US09819142B2

公开(公告)日：2017-11-14

申请号：US13958703

申请日：2013-08-05

Applicant: IMRA AMERICA, INC.

Inventor： Martin E. Fermann

IPC: H01S3/00 ,  H01S3/11 ,  H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H01S3/109 ,  H01S3/16

CPC classification number: H01S3/1115 ,  H01S3/0057 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094019 ,  H01S3/094042 ,  H01S3/109 ,  H01S3/1112 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/302

Abstract: A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Peak power handling capability of fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive pulse stretching in the presence of self-phase modulation and gain results in the formation of high-power parabolic pulses. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented, or an Anti-Stokes fiber in conjunction with fiber amplifiers and Raman-shifters are used. Positive dispersion optical amplifiers are used to improve transmission characteristics. An optical communication system utilizes a Raman amplifier fiber pumped by a train of Raman-shifted, wavelength-tunable pump pulses, to thereby amplify an optical signal which counterpropagates within the Raman amplifier fiber with respect to the pump pulses.

公开(公告)号：US09645309B2

公开(公告)日：2017-05-09

申请号：US14500563

申请日：2014-09-29

Applicant: IMRA America, Inc.

Inventor： Liang Dong ,  Donald J. Harter ,  William Wong

IPC: G02B6/032 ,  H01S3/00 ,  G02B6/36 ,  H01S3/067 ,  G02B6/02 ,  G02B6/14 ,  G02B6/024 ,  G02B6/32

CPC classification number: G02B6/032 ,  G02B6/02009 ,  G02B6/02047 ,  G02B6/02328 ,  G02B6/02338 ,  G02B6/02342 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/024 ,  G02B6/14 ,  G02B6/32 ,  H01S3/06716 ,  H01S3/06729 ,  H01S3/06733 ,  H01S3/06741 ,  H01S3/06754

Abstract: Holey fibers provide optical propagation. In various embodiments, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers.