公开(公告)号：WO2005094275A2

公开(公告)日：2005-10-13

申请号：PCT/US2005/010081

申请日：2005-03-25

Applicant: IMRA AMERICA, INC. ,  IMESHEV, Gennady ,  FERMANN, Martin

Inventor： IMESHEV, Gennady ,  FERMANN, Martin

IPC: G02F1/355 ,  G02F1/39 ,  H01S3/00 ,  H01S3/067 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/109 ,  H01S3/16 ,  H01S3/23 ,  H01S3/30

CPC classification number: H01S3/10015 ,  G02F1/3558 ,  G02F1/39 ,  G02F2001/392 ,  G02F2203/26 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/06708 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/08013 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/109 ,  H01S3/1608 ,  H01S3/1616 ,  H01S3/302

Abstract: Embodiments described herein include a system for producing ultrashort tunable pulses based on ultra broadband OPA or OPG in nonlinear materials. The system parameters such as the nonlinear material, pump wavelengths, quasi-phase matching periods, and temperatures can be selected to utilize the intrinsic dispersion relations for such material to produce bandwidth limited or nearly bandwidth limited pulse compression. Compact high average power sources of short optical pulses tunable in the wavelength range of 1800 - 2100 nm and after frequency doubling in the wavelength range of 900 - 1050 nm can be used as a pump for the ultra broadband OPA or OPG. In certain embodiments, these short pump pulses are obtained from an Er fiber oscillator at about 1550 nm, amplified in Er fiber, Raman-shifted to 1800 - 2100 nm, stretched in a fiber stretcher, and amplified in Tm-doped fiber. To produce short pulses in the 900 - 1050 nm wavelength range, the pulses are frequency-doubled with a chirped frequency doubler for nearly bandwidth-limited output.

Abstract translation: 本文描述的实施例包括用于在非线性材料中基于超宽带OPA或OPG产生超短可调脉冲的系统。 可以选择系统参数，例如非线性材料，泵浦波长，准相位匹配周期和温度，以利用这种材料的固有色散关系产生带宽限制或接近带宽限制的脉冲压缩。 可在1800 - 2100 nm的波长范围内调节的短光脉冲的紧凑型高平均电源，在900 - 1050 nm波长范围内倍频后，可用作超宽带OPA或OPG的泵。 在某些实施例中，这些短泵浦脉冲从大约1550nm的Er光纤振荡器获得，在Er光纤中放大，拉曼偏移到1800-2100nm，在纤维拉伸器中拉伸，并在Tm掺杂光纤中进行放大。 为了在900 - 1050 nm波长范围内产生短脉冲，脉冲频率加倍，啁啾倍频器几乎受带宽限制的输出。

公开(公告)号：WO2012112253A2

公开(公告)日：2012-08-23

申请号：PCT/US2012/021523

申请日：2012-01-17

Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin

Inventor： FERMANN, Martin

IPC: B23K26/00 ,  H01S3/30

CPC classification number: H01S3/06725 ,  B23K26/0066 ,  B23K26/361 ,  B23K26/362 ,  H01S3/06712 ,  H01S3/06741 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/10015 ,  H01S3/10092 ,  H01S3/1112 ,  H01S3/1118 ,  H01S3/1608 ,  H01S3/1616

Abstract: Compact high brightness light sources for the mid and far IR spectral region, and exemplary applications are disclosed based on passively mode locked Tm fiber comb lasers. In at least one embodiment the coherence of the comb sources is increased in a system utilizing an amplified single-frequency laser to pump the Tm fiber comb laser. The optical bandwidth generated by the passively mode locked Tm fiber comb laser is further decreased by using simultaneous 2 nd and 3 rd order dispersion compensation using either appropriate chirped fiber Bragg gratings for dispersion compensation, or fibers with appropriately selected values of 2 nd and 3 rd order dispersion. Fibers with large anomalous values of third order dispersion, or fibers with large numerical apertures, for example fibers having air-holes formed in the fiber cladding may be utilized.

Abstract translation: 基于被动模式锁定的Tm光纤梳状激光器公开了用于中红外光谱区域和远红外光谱区域的紧凑型高亮度光源，以及示例性应用。 在至少一个实施例中，在使用放大的单频激光器来泵浦Tm纤维梳状激光器的系统中，梳状源的相干性增加。 通过使用用于色散补偿的适当的啁啾光纤布拉格光栅或具有适当选择的二阶和三阶色散值的光纤，通过使用同时的二次和三阶色散补偿来进一步减少由被动模式锁定的Tm光纤梳状激光器产生的光学带宽。 可以使用具有三阶分散的大异常值的纤维或具有大数值孔径的纤维，例如在纤维包层中形成具有空气孔的纤维。

公开(公告)号：WO2014062759A2

公开(公告)日：2014-04-24

申请号：PCT/US2013/065169

申请日：2013-10-16

Applicant: IMRA AMERICA, INC.

Inventor： FERMANN, Martin

IPC: G02F1/35

CPC classification number: H01S3/1106 ,  B23K26/0624 ,  H01J49/161 ,  H01S3/0057 ,  H01S3/06708 ,  H01S3/06741 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094026 ,  H01S3/094042 ,  H01S3/094061 ,  H01S3/0941 ,  H01S3/109 ,  H01S3/1115

Abstract: The present invention relates to compact, low noise, ultra-short pulse sources based on fiber amplifiers, and various applications thereof. At least one implementation includes an optical amplification system having a fiber laser seed source producing seed pulses at a repetition rate corresponding to the fiber laser cavity round trip time. A nonlinear pulse transformer, comprising a fiber length greater than about 10 m, receives a seed pulse at its input and produces a spectrally broadened output pulse at its output, the output pulse having a spectral bandwidth which is more than 1.5 times a spectral bandwidth of a seed pulse. A fiber power amplifier receives and amplifies spectrally broadened output pulses. A pulse compressor is configured to temporally compress spectrally broadened pulses amplified by said power amplifier. Applications include micro-machining, ophthalmology, molecular desorption or ionization, mass-spectroscopy, and/or laser- based, biological tissue processing.

Abstract translation: 本发明涉及基于光纤放大器的紧凑，低噪声，超短脉冲源及其各种应用。 至少一个实施方案包括具有光纤激光种子源的光放大系统，其以对应于光纤激光腔往返时间的重复频率产生种子脉冲。 包括光纤长度大于约10微米的非线性脉冲变压器在其输入处接收种子脉冲，并在其输出端产生光谱扩展的输出脉冲，其输出脉冲的频谱带宽大于光谱带宽的1.5倍 种子脉冲。 光纤功率放大器接收并放大光谱扩展的输出脉冲。 脉冲压缩器被配置为在时间上压缩由所述功率放大器放大的频谱变宽的脉冲。 应用包括微加工，眼科学，分子解吸或离子化，质谱法和/或基于激光的生物组织处理。

公开(公告)号：WO2012074623A1

公开(公告)日：2012-06-07

申请号：PCT/US2011/057567

申请日：2011-10-25

Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin ,  HARTL, Ingmar

Inventor： FERMANN, Martin ,  HARTL, Ingmar

IPC: H01S3/098

CPC classification number: G02F1/365 ,  G01J3/10 ,  G02F2001/3528 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/0675 ,  H01S3/08054 ,  H01S3/0809 ,  H01S3/10046 ,  H01S3/105 ,  H01S3/1106 ,  H01S3/1112 ,  H01S3/1115 ,  H01S3/1118 ,  H01S3/1618

Abstract: A frequency comb laser providing large comb spacing is disclosed. At least one embodiment includes a mode locked waveguide laser system. The mode locked waveguide laser includes a laser cavity having a waveguide, and a dispersion control unit (DCU) in the cavity. The DCU imparts an angular dispersion, group-velocity dispersion (GVD) and a spatial chirp to a beam propagating in the cavity. The DCU is capable of producing net GVD in a range from a positive value to a negative value. In some embodiments a tunable fiber frequency comb system configured as an optical frequency synthesizer is provided. In at least one embodiment a low phase noise micro-wave source may be implemented with a fiber comb laser having a comb spacing greater than about 1 GHz. The laser system is suitable for mass-producible fiber comb sources with large comb spacing and low noise. Applications include high-resolution spectroscopy.

Abstract translation: 公开了一种提供较大梳形间距的频率梳状激光器。 至少一个实施例包括模式锁定波导激光系统。 模式锁定波导激光器包括具有波导的激光腔和空腔中的色散控制单元（DCU）。 DCU向在腔中传播的光束赋予角度色散，群速度色散（GVD）和空间啁啾声。 DCU能够在从正值到负值的范围内产生净GVD。 在一些实施例中，提供了被配置为光频合成器的可调光纤频率梳状系统。 在至少一个实施例中，低相位噪声微波源可以用具有大于约1GHz的梳齿间隔的光纤梳状激光器来实现。 激光系统适用于具有大梳齿间隔和低噪音的大规模生产的光纤梳状光源。 应用包括高分辨率光谱。

公开(公告)号：EP1812823A2

公开(公告)日：2007-08-01

申请号：EP05730897.5

申请日：2005-03-25

Applicant: Imra America, Inc.

Inventor： IMESHEV, Gennady ,  FERMANN, Martin

IPC: G02F1/355

CPC classification number: H01S3/10015 ,  G02F1/3558 ,  G02F1/39 ,  G02F2001/392 ,  G02F2203/26 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/06708 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/08013 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/109 ,  H01S3/1608 ,  H01S3/1616 ,  H01S3/302

Abstract: Embodiments described herein include a system for producing ultrashort tunable pulses based on ultra broadband OPA or OPG in nonlinear materials. The system parameters such as the nonlinear material, pump wavelengths, quasi-phase matching periods, and temperatures can be selected to utilize the intrinsic dispersion relations for such material to produce bandwidth limited or nearly bandwidth limited pulse compression. Compact high average power sources of short optical pulses tunable in the wavelength range of 1800 - 2100 nm and after frequency doubling in the wavelength range of 900 - 1050 nm can be used as a pump for the ultra broadband OPA or OPG. In certain embodiments, these short pump pulses are obtained from an Er fiber oscillator at about 1550 nm, amplified in Er fiber, Raman-shifted to 1800 - 2100 nm, stretched in a fiber stretcher, and amplified in Tm-doped fiber. To produce short pulses in the 900 - 1050 nm wavelength range, the pulses are frequency-doubled with a chirped frequency doubler for nearly bandwidth-limited output.