公开(公告)号：WO2016048740A2

公开(公告)日：2016-03-31

申请号：PCT/US2015/050362

申请日：2015-09-16

Applicant: IMRA AMERICA, INC.

Inventor： FERMANN, Martin, E. ,  KUSE, Naoya ,  LEE, Kevin, F.

IPC: H01S3/105

CPC classification number: H01S3/1112 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/10061 ,  H01S3/105 ,  H01S3/106 ,  H01S3/1067 ,  H01S3/107 ,  H01S3/108 ,  H01S3/1115 ,  H01S3/1118 ,  H01S3/1305 ,  H01S3/1312 ,  H01S3/139 ,  H01S3/1608 ,  H01S3/2308 ,  H01S2301/02

Abstract: The present disclosure relates to the design of fiber frequency comb lasers with low carrier phase noise. Examples of these low carrier phase noise oscillators can be constructed from both soliton and dispersion compensated fiber lasers via the use of intra-cavity amplitude modulators such as graphene modulators. In low carrier phase noise dispersion compensated fiber frequency comb lasers, graphene and/or bulk modulators can further be used, for example, for phase locking of one comb line to an external continuous wave (cw) reference laser via high bandwidth control of the repetition rate of the comb laser via the graphene modulator. As a result a low phase noise radio frequency (RF) signal can be generated. In some implementations, a frequency comb exhibiting phase noise suppression of at least about 10 dB over a frequency range up to about 100 kHz is provided.

Abstract translation: 本公开涉及具有低载波相位噪声的光纤频梳激光器的设计。 这些低载波相位噪声振荡器的例子可以由孤子和色散补偿光纤激光器通过使用腔内振幅调制器如石墨烯调制器来构建。 在低载波相位噪声色散补偿光纤频梳激光器中，例如可以进一步使用石墨烯和/或体调制器，用于通过重复的高带宽控制将一条梳状线锁相至外部连续波（cw）参考激光器 梳状激光通过石墨烯调制器的速率。 结果可以产生低相位噪声射频（RF）信号。 在一些实施方式中，提供了频率梳，该频率梳在高达大约100kHz的频率范围内呈现至少约10dB的相位噪声抑制。

公开(公告)号：WO2021126575A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/063575

申请日：2020-12-07

Applicant: IMRA AMERICA, INC.

Inventor： FERMANN, Martin, E. ,  LEE, Kevin, F.

IPC: H01S3/00 ,  H01S3/0057 ,  H01S5/02251 ,  H01S5/06253 ,  H01S5/0657

Abstract: A pulse transformer for modifying the amplitude and phase of short optical pulses includes a pulse source and an adaptively controlled stretcher or compressor including at least one fiber Bragg grating (FBG) configured to receive pulses from the pulse source and having a first second-order dispersion parameter (D21). The pulse transformer further includes at least one optical amplifier configured to receive pulses from the FBG and a compressor configured to receive pulses from the at least one optical amplifier. The compressor has a second second-order dispersion parameter (‑D22), an absolute value of the first second-order dispersion parameter (|D21|) and an absolute value of the second second-order dispersion parameter (|‑D22|) that are substantially equal to one another to within 10%.

公开(公告)号：WO2017209989A1

公开(公告)日：2017-12-07

申请号：PCT/US2017/033549

申请日：2017-05-19

Applicant: IMRA AMERICA, INC.

Inventor： LEE, Kevin, F. ,  FERMANN, Martin, E.

IPC: G02F1/01 ,  G02F1/35 ,  H01S3/067 ,  G02B26/00

Abstract: Systems and methods for stabilizing mid-infrared light generated by difference frequency mixing may include a mode locked Er fiber laser that generates pulses, which are split into a pump arm and a wavelength shifting, signal arm. Pump arm pulses are amplified in Er doped fiber. Shifting arm pulses are amplified in Er doped fiber and shifted to longer wavelengths in Raman- shifting fiber or highly nonlinear fiber, where they may be further amplified by Tm doped fiber, and then optionally further wavelength shifted. Pulses from the two arms can be combined in a nonlinear crystal such as orientation-patterned gallium phosphide, producing a mid-infrared difference frequency, as well as nonlinear combinations (e.g., sum frequency) having near infrared and visible wavelengths. Optical power stabilization can be achieved using two wavelength ranges with spectral filtering and multiple detectors acquiring information for feedback control. Controlled fiber bending can be used to stabilize optical power.

Abstract translation: 用于稳定由差频混频产生的中红外光的系统和方法可以包括产生脉冲的锁模Er光纤激光器，其被分成泵臂和波长偏移信号臂。 在铒掺杂光纤中放大泵臂脉冲。 移动臂脉冲在铒掺杂光纤中被放大，并且在拉曼位移光纤或高度非线性光纤中被移位到更长波长，其中它们可以被Tm掺杂光纤进一步放大，然后可选地进一步波长移位。 来自两个臂的脉冲可以组合成非线性晶体，例如定向图案化的磷化镓，产生中红外差频以及具有近红外和可见光波长的非线性组合（例如和频）。 光功率稳定可以使用两个波长范围与光谱过滤和多个检测器获取反馈控制信息来实现。 受控光纤弯曲可以用来稳定光功率。