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    • 1. 发明公开
    • Synthetic aperture ladar with chirped modelocked waveform
    • LADAR mit synthetischer Apertur Ladar und modenselektiver,chirpartiger Wellenform
    • EP1542036A1
    • 2005-06-15
    • EP04257594.4
    • 2004-12-07
    • Raytheon Company
    • Halmos, Maurice J.
    • G01S17/10G01S7/484
    • G01S17/895G01S7/484G01S17/003G01S17/102H01S3/105H01S3/107H01S3/1109H01S3/1112
    • The present invention uses an intra-cavity modulation approach to modulate a laser transmitter at bandwidths greater than a few gigahertz (GHz) in a non-ambiguous waveform by chirping the laser and simultaneously mode locking. Accordingly, the inventive system includes a source of a beam of electro-magnetic energy; a mechanism for mode locking the beam; and an arrangement for chirping the beam. In the illustrative embodiment, the source is a laser. The mode locking mechanism may be an active element or a passive element. The beam is chirped with a translation mirror. The translation mirror may be driven with a piezo-electric drive coupled. In the best mode, the carrier is chirped with an electro-optical crystal disposed in the cavity of the laser. The laser is chirped to the free-spectral range limit, which is typically a few hundred megahertz, by scanning the optical length of the laser resonator. After simultaneously mode locking, the waveform created is a train of mode locked pulses that have an optical carrier frequency chirped in time.
    • 本发明使用腔内调制方法通过啁啾激光器和同时模式锁定在非歧义波形中调制大于几吉赫兹(GHz)的带宽的激光发射机。 因此,本发明的系统包括电磁能束的源; 用于模式锁定光束的机构; 以及用于啁啾梁的装置。 在说明性实施例中,源是激光。 模式锁定机构可以是有源元件或无源元件。 光束用平移镜啁啾。 平移反射镜可以用耦合的压电驱动来驱动。 在最佳模式下,载体被配置在激光器腔内的电光晶体啁啾。 通过扫描激光谐振器的光学长度,激光器被啁啾到自由光谱范围限制,其通常为几百兆赫兹。 在同时模式锁定之后,所产生的波形是一系列模拟锁定脉冲,其具有在时间上啁啾的光载波频率。
    • 10. 发明公开
    • Synthetic aperture ladar with chirped modelocked waveform
    • Synthetischer Laser-Aperturradar mit modengekoppelter Chirp-Wellenform
    • EP2078968A2
    • 2009-07-15
    • EP09005227.5
    • 2004-12-07
    • Raytheon Company
    • Halmos, Maurice J.
    • G01S17/10G01S7/484
    • G01S17/895G01S7/484G01S17/003G01S17/102H01S3/105H01S3/107H01S3/1109H01S3/1112
    • The present invention uses an intra-cavity modulation approach to modulate a laser transmitter at bandwidths greater than a few gigahertz (GHz) in a non-ambiguous waveform by chirping the laser and simultaneously mode locking. Accordingly, the inventive system includes a source of a beam of electro-magnetic energy; a mechanism for mode locking the beam; and an arrangement for chirping the beam. In the illustrative embodiment, the source is a laser. The mode locking mechanism may be an active element or a passive element. The beam is chirped with a translation mirror. The translation mirror may be driven with a piezo-electric drive coupled. In the best mode, the carrier is chirped with an electro-optical crystal disposed in the cavity of the laser. The laser is chirped to the free-spectral range limit, which is typically a few hundred megahertz, by scanning the optical length of the laser resonator. After simultaneously mode locking, the waveform created is a train of mode locked pulses that have an optical carrier frequency chirped in time.
    • 本发明使用腔内调制方法通过啁啾激光器和同时模式锁定在非歧义波形中调制大于几吉赫兹(GHz)的带宽的激光发射机。 因此,本发明的系统包括电磁能束的源; 用于模式锁定光束的机构; 以及用于啁啾梁的装置。 在说明性实施例中,源是激光。 模式锁定机构可以是有源元件或无源元件。 光束用平移镜啁啾。 平移反射镜可以用耦合的压电驱动来驱动。 在最佳模式下,载体被配置在激光器腔内的电光晶体啁啾。 通过扫描激光谐振器的光学长度,激光器被啁啾到自由光谱范围限制,其通常为几百兆赫兹。 在同时模式锁定之后,所产生的波形是一系列模拟锁定脉冲,其具有在时间上啁啾的光载波频率。