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    • 2. 发明授权
    • Pulsed laser sources
    • 脉冲激光源
    • US08456735B2
    • 2013-06-04
    • US13526137
    • 2012-06-18
    • Martin E. FermannIngmar HartlGennady Imeshev
    • Martin E. FermannIngmar HartlGennady Imeshev
    • G02F1/35H01S3/098
    • H01S3/0057G02F1/3517G02F2001/3528H01S3/0078H01S3/0092H01S3/067H01S3/0675H01S3/06754H01S3/094042H01S3/10H01S3/105H01S3/1053H01S3/106H01S3/1067H01S3/109H01S3/1106H01S3/1118H01S3/1616
    • Modelocked fiber laser resonators may be coupled with optical amplifiers. An isolator optionally may separate the resonator from the amplifier. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. Low dispersion and an in-line interferometer that provides feedback may assist in controlling the frequency components output from the comb source.
    • 模式锁定光纤激光谐振器可以与光放大器耦合。 隔离器可选地可以将谐振器与放大器分离。 可以采用具有相对低的反射率的谐振器的一端上的反射光学元件来将来自谐振器的光耦合到放大器。 可以提供增强的脉冲宽度控制,其具有两个偏振保持和非偏振保持光纤的级联部分。 变形光纤布拉格光栅和集成光纤偏振器也可以包括在激光腔中,以帮助线性偏振空腔的输出。 可以通过将光栅的色散值与腔内光纤的色散相反来获得具有大的光学带宽的非常短的脉冲。 频率梳源可以由这种锁模光纤振荡器构成。 提供反馈的低色散和在线干涉仪可以有助于控制从梳状源输出的频率分量。
    • 3. 发明申请
    • BROADBAND GENERATION OF MID IR, COHERENT CONTINUA WITH OPTICAL FIBERS
    • 中等红外,宽带连续光纤光纤的宽带产生
    • US20120236314A1
    • 2012-09-20
    • US13415374
    • 2012-03-08
    • Martin E. FERMANNIngmar HARTL
    • Martin E. FERMANNIngmar HARTL
    • G01B9/02G02B6/00
    • G02F1/365G02F2001/3528H01S3/10
    • Coherent and compact supercontinuum light sources for the mid IR spectral regime are disclosed and exemplary applications thereof. The supercontinuum generation is based on the use of highly nonlinear fibers or waveguides. In at least one embodiment the coherence of the supercontinuum sources is increased using low noise mode locked short pulse sources. Compact supercontinuum light sources can be constructed with the use of passively mode locked fiber or diode lasers. Wavelength tunable sources can be constructed using appropriate optical filters or frequency conversion sections. Highly coherent supercontinuum sources further facilitate coherent detection schemes and can improve the signal/noise ratio in lock in detection schemes.
    • 中红外光谱方案的相干紧凑超连续光源被公开及其示例性应用。 超连续谱生成是基于使用高度非线性的光纤或波导。 在至少一个实施例中,使用低噪声模式锁定短脉冲源来增加超连续谱源的相干性。 紧凑型超连续光源可以采用被动锁模光纤或二极管激光器构成。 可以使用适当的光学滤波器或变频部分来构建波长可调谐源。 高度一致的超连续谱源可进一步促进相干检测方案,并可以在锁定检测方案中提高信噪比。
    • 4. 发明授权
    • Optical scanning and imaging systems based on dual pulsed laser systems
    • 基于双脉冲激光系统的光学扫描和成像系统
    • US08237122B2
    • 2012-08-07
    • US13399392
    • 2012-02-17
    • Martin E. FermannIngmar Hartl
    • Martin E. FermannIngmar Hartl
    • G01J5/02
    • H01S3/10046G01B9/02001G01N21/31G01N2021/317G02B6/02304H01S3/0675H01S3/06754H01S3/08054H01S3/1067H01S3/1068H01S3/11H01S3/1115H01S3/13H01S3/1307H01S3/1392H01S3/1394H01S3/2383
    • The invention relates to scanning pulsed laser systems for optical imaging. Coherent dual scanning laser systems (CDSL) are disclosed and some applications thereof. Various alternatives for implementation are illustrated, including highly integrated configurations. In at least one embodiment a coherent dual scanning laser system (CDSL) includes two passively modelocked fiber oscillators. The oscillators are configured to operate at slightly different repetition rates, such that a difference δfr in repetition rates is small compared to the values fr1 and fr2 of the repetition rates of the oscillators. The CDSL system also includes a non-linear frequency conversion section optically connected to each oscillator. The section includes a non-linear optical element generating a frequency converted spectral output having a spectral bandwidth and a frequency comb comprising harmonics of the oscillator repetition rates. A CDSL may be arranged in an imaging system for one or more of optical imaging, microscopy, micro-spectroscopy and/or THz imaging.
    • 本发明涉及用于光学成像的扫描脉冲激光系统。 公开了相干双扫描激光系统(CDSL)及其一些应用。 示出了用于实现的各种替代方案,包括高度集成的配置。 在至少一个实施例中,相干双扫描激光系统(CDSL)包括两个被动锁模光纤振荡器。 振荡器被配置为以稍微不同的重复率操作,使得与振荡器的重复率的值fr1和fr2相比,重复率的差δfr小。 CDSL系统还包括与每个振荡器光学连接的非线性频率转换部分。 该部分包括产生具有频谱带宽的频率转换频谱输出和包括振荡器重复频率的谐波的频率梳的非线性光学元件。 可以在成像系统中布置CDSL以用于光学成像,显微镜,微光谱和/或THz成像中的一种或多种。
    • 5. 发明授权
    • Pulsed laser sources
    • 脉冲激光源
    • US08208196B2
    • 2012-06-26
    • US12687807
    • 2010-01-14
    • Martin E. FermannIngmar HartlGennady Imeshev
    • Martin E. FermannIngmar HartlGennady Imeshev
    • G02F1/35H01S3/098
    • H01S3/0057G02F1/3517G02F2001/3528H01S3/0078H01S3/0092H01S3/067H01S3/0675H01S3/06754H01S3/094042H01S3/10H01S3/105H01S3/1053H01S3/106H01S3/1067H01S3/109H01S3/1106H01S3/1118H01S3/1616
    • Various embodiments include modelocked fiber laser resonators that may be coupled with optical amplifiers. An isolator may separate the laser resonator from the amplifier, although certain embodiments exclude such an isolator. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the laser resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may be also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the fiber Bragg grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. In various exemplary embodiments, low dispersion and an in-line interferometer that provides feedback, assist in controlling the frequency components output from the comb source.
    • 各种实施例包括可与光放大器耦合的锁模光纤激光谐振器。 隔离器可以将激光谐振器与放大器分离,尽管某些实施例不包括这种隔离器。 可以使用具有相对较低反射率的谐振器的一端上的反射光学元件将来自激光谐振器的光耦合到放大器。 可以提供增强的脉冲宽度控制,其具有两个偏振保持和非偏振保持光纤的级联部分。 变形光纤布拉格光栅和集成光纤偏振器也可以包括在激光腔中,以帮助线性偏振空腔的输出。 可以通过将光纤布拉格光栅的色散值与腔内光纤的色散相反来获得具有大光学带宽的非常短的脉冲。 频率梳源可以由这种锁模光纤振荡器构成。 在各种示例性实施例中,提供反馈的低色散和在线干涉仪有助于控制从梳状源输出的频率分量。