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    Method of excitation of an optical cavity for detecting gas traces
    1.
    发明授权
    Method of excitation of an optical cavity for detecting gas traces 有权
    用于检测气体痕迹的光学腔的激发方法

    公开(公告)号：US06504145B1

    公开(公告)日：2003-01-07

    申请号：US09674627

    申请日：2000-10-30

    Applicant: Daniele Romanini ,  Alexandre Katchanov

    Inventor： Daniele Romanini ,  Alexandre Katchanov

    IPC: G01N2125

    CPC classification number: G01N21/39

    Abstract: The invention concerns a method for detecting gas traces with a semiconductor laser coupled with an optical resonant cavity containing a species to be analyzed. The laser is coupled with the cavity so that the light is not projected back towards the laser when the cavity is in resonance mode. The laser supplies an amplified and fine-tuned emission on the re-injected frequency and, when a current pulse is applied thereon, its frequency moves from a predetermined initial frequency to a final predetermined frequency. The laser is excited by a first current pulse such that its frequency is sequentially locked on the cavity successive modes. The luminous intensity decreasing time in the cavity is measured at the end of the pulse and the excitation and measurement steps are repeated for successive current pulses, to cover a spectral range to be analyzed.

    Abstract translation: 本发明涉及一种利用与包含待分析物种的光学谐振腔耦合的半导体激光器来检测气体迹线的方法。 激光器与空腔耦合，使得当空腔处于共振模式时，光不会朝向激光器反射。 激光器在重新注入的频率上提供放大和微调的发射，并且当施加电流脉冲时，其频率从预定的初始频率移动到最终的预定频率。 激光由第一电流脉冲激发，使得其频率被顺序地锁定在空腔连续模式上。 在脉冲结束时测量空腔中的发光强度降低时间，并对连续的电流脉冲重复激发和测量步骤，以覆盖待分析的光谱范围。

    Laser with reflective etalon tuning element
    2.
    发明申请
    Laser with reflective etalon tuning element 审中-公开
    具有反光标准杆调谐元件的激光

    公开(公告)号：US20060056465A1

    公开(公告)日：2006-03-16

    申请号：US10938270

    申请日：2004-09-10

    Applicant: Jinchun Xie ,  Alexandre Katchanov ,  Barbara Paldus

    Inventor： Jinchun Xie ,  Alexandre Katchanov ,  Barbara Paldus

    IPC: H01S3/10

    CPC classification number: H01S3/08059 ,  H01S3/10 ,  H01S3/105 ,  H01S3/1062 ,  H01S5/141

    Abstract: A tunable laser and laser tuning method based on the use of a tunable etalon in reflection as a mirror within a laser cavity. The laser emission wavelength is not necessarily at a wavelength of peak etalon reflectivity. A preferred embodiment makes use of a microelectromechanical etalon to tune an external cavity semiconductor laser.

    Abstract translation: 基于在激光腔内作为反射镜使用可调标准具的可调谐激光和激光调谐方法。 激光发射波长不一定在标准具有峰值反射率的波长。 优选的实施例利用微机电标准具来调谐外腔半导体激光器。

    Optical transmitter comprising a stepwise tunable laser
    7.
    发明授权
    Optical transmitter comprising a stepwise tunable laser 有权
    光发射机包括逐步可调激光器

    公开(公告)号：US06611546B1

    公开(公告)日：2003-08-26

    申请号：US09930841

    申请日：2001-08-15

    Applicant: Arnaud Garnache ,  Daniele Romanini ,  Frederic Stoeckel ,  Alexandre Katchanov ,  Guido Knippels ,  Barbara Paldus ,  Christopher Rella ,  Bruce Richman ,  Marc Levenson

    Inventor： Arnaud Garnache ,  Daniele Romanini ,  Frederic Stoeckel ,  Alexandre Katchanov ,  Guido Knippels ,  Barbara Paldus ,  Christopher Rella ,  Bruce Richman ,  Marc Levenson

    IPC: H01S308

    CPC classification number: H01S5/02288 ,  H01S3/1062 ,  H01S5/0217 ,  H01S5/041 ,  H01S5/0687 ,  H01S5/141 ,  H01S5/18361 ,  H01S5/18375 ,  H01S5/18377

    Abstract: An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which corresponding to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, that tuning arrangement comprises a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another. An optical modulator adds modulation to a beam emitting from the laser to provide the information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system. A calibration method based on detecting inter-mode optical transitions (mode hopping) is described. The parameters of the amplifying mirror and tuning arrangement can be adjusted during operation to switch quickly from one cavity mode to another in stepwise fashion.

    Abstract translation: 用于发射信息载体的激光束的光纤发射器包括光学或电泵浦的单模MQW（多量子阱）半导体放大镜作为增益介质和单独的外部反射器以形成空腔。 外部空腔长度定义了光学模式梳，其全部或一部分对应于具有多个光学通道的光通信系统的通道波长。 半导体增益元件具有均匀加宽的增益区域; 调谐装置将激光从模式调谐到增益区域，从而选择多个光通道中的每一个。 当最大增益带宽小于由空腔限定的模 - 模间隔时，该调谐装置包括改变放大镜的温度的装置，从而将增益峰值的频率从一种模式转换到另一种模式。 光调制器向从激光器发射的光束增加调制以提供信息传送激光束，并且耦合器将信息传送激光束耦合到光通信系统的光纤中。 描述了基于检测模式间转换（跳频）的校准方法。 在操作期间可以调节放大镜和调谐装置的参数，以逐步的方式从一个腔模式快速切换到另一腔模式。

    Optical transmitter having optically pumped vertical external cavity surface emitting laser
    8.
    发明授权
    Optical transmitter having optically pumped vertical external cavity surface emitting laser 失效
    具有光泵浦垂直外腔表面发射激光器的光发射器

    公开(公告)号：US06741629B1

    公开(公告)日：2004-05-25

    申请号：US09668905

    申请日：2000-09-22

    Applicant: Arnaud Garnache ,  Alexandre Katchanov ,  Barbara Paldus ,  Daniele Romanini ,  Frederic Stoeckel

    Inventor： Arnaud Garnache ,  Alexandre Katchanov ,  Barbara Paldus ,  Daniele Romanini ,  Frederic Stoeckel

    IPC: H01S5183

    CPC classification number: H01S5/02288 ,  H01S5/0217 ,  H01S5/02461 ,  H01S5/041 ,  H01S5/06804 ,  H01S5/0687 ,  H01S5/141 ,  H01S5/18361 ,  H01S5/18375 ,  H01S5/18377

    Abstract: An optical fiber transmitter comprises an optically pumped single mode MQW VECSEL for emitting an information-carrying laser beam and has an external cavity length defining a comb of optical modes, each mode corresponding to a channel wavelength of an optical telecommunications system having plural optical channels. A semiconductor structure of the VECSEL has an optical-pump-excited multiple quantum well (MQW) homogeneously broadened gain region active over a band which is less than mode-to-mode spacing, the gain region being tunable to hop from a first mode to an adjacent second mode. A tuning arrangement tunes the VECSEL from mode to mode thereby to select each one of the plural optical channels. An optical modulator adds modulation to a beam emitting from the laser to provide the information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system. A calibration method based on detecting inter-mode optical transitions (mode hopping) is described.

    Abstract translation: 一种光纤发射机包括光泵浦单模MQW VECSEL，用于发射信息载体的激光束，具有定义光模梳的外腔长度，每个模式对应于具有多个光通道的光通信系统的信道波长。 VECSEL的半导体结构具有光泵浦激发的多量子阱（MQW）在比模式间距间隔小的频带上有效的均匀增宽的增益区域，该增益区域可调谐以从第一模式跳到 相邻的第二模式。 调谐装置将VECSEL从模式调谐到模式，从而选择多个光学通道中的每一个。 光调制器向从激光器发射的光束增加调制以提供信息传送激光束，并且耦合器将信息传送激光束耦合到光通信系统的光纤中。 描述了基于检测模式间转换（跳频）的校准方法。

    Optical transmitter comprising a stepwise tunable laser
    9.
    发明授权
    Optical transmitter comprising a stepwise tunable laser 失效
    光发射机包括逐步可调激光器

    公开(公告)号：US06711203B1

    公开(公告)日：2004-03-23

    申请号：US10104347

    申请日：2002-03-22

    Applicant: Arnaud Garnache ,  Daniele Romanini ,  Frederic Stoeckel ,  Alexandre Katchanov ,  Guido Knippels ,  Barbara Paldus ,  Christopher Rella ,  Bruce Richman ,  Marc Levenson ,  Robert Lodenkamper

    Inventor： Arnaud Garnache ,  Daniele Romanini ,  Frederic Stoeckel ,  Alexandre Katchanov ,  Guido Knippels ,  Barbara Paldus ,  Christopher Rella ,  Bruce Richman ,  Marc Levenson ,  Robert Lodenkamper

    IPC: H01S500

    CPC classification number: H01S5/18377 ,  H01S3/094084 ,  H01S3/105 ,  H01S5/0217 ,  H01S5/0222 ,  H01S5/02288 ,  H01S5/041 ,  H01S5/0687 ,  H01S5/141 ,  H01S5/183 ,  H01S5/18355 ,  H01S5/18375 ,  H01S2301/14

    Abstract: An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi-quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which correspond to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region, thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, the tuning arrangement includes a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another. An optical modulator adds modulation to provide an information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system. A calibration method based on detecting inter-mode optical transitions (mode hopping) is described. The parameters of the amplifying mirror and tuning arrangement can be adjusted during operation to switch quickly from one cavity mode to another in stepwise fashion.

    Abstract translation: 用于发射信息携带激光束的光纤发射器包括作为增益介质的光学或电泵浦单模MQW（多量子阱）半导体放大镜，以及用于形成空腔的单独的外部反射器。 外部腔长度定义了光学模式梳，其全部或一部分对应于具有多个光学通道的光通信系统的通道波长。 半导体增益元件具有均匀加宽的增益区域; 调谐装置将激光从模式调谐到增益区域，从而选择多个光通道中的每一个。 当最大增益带宽小于由腔限定的模 - 模间隔时，调谐装置包括改变放大镜的温度的装置，从而将增益峰值的频率从一种模式转换到另一种模式。 光调制器增加调制以提供信息携带激光束，并且耦合器将信息传送激光束耦合到光通信系统的光纤中。 描述了基于检测模式间转换（跳频）的校准方法。 在操作期间可以调节放大镜和调谐装置的参数，以逐步的方式从一个腔模式快速切换到另一腔模式。

    Spectro-temporal analyzer
    10.
    发明授权
    Spectro-temporal analyzer 有权
    光谱分析仪

    公开(公告)号：US06665069B1

    公开(公告)日：2003-12-16

    申请号：US10010311

    申请日：2001-11-09

    Applicant: Dmitri Permogorov ,  Alexandre Katchanov ,  Hoa Pham ,  Gerald P. Coleman

    Inventor： Dmitri Permogorov ,  Alexandre Katchanov ,  Hoa Pham ,  Gerald P. Coleman

    IPC: G01J328

    CPC classification number: G01J3/28

    Abstract: System and method for simultaneously providing a wavelength spectral distribution and a temporal distribution of an incident light beam. The light beam is received at a wavelength spectral distribution module and is separated into light beam segments corresponding to at least two different wavelengths in a first selected direction transverse to beam propagation direction. The light beam is also received at a temporal distribution module, and segments of the light beam are distributed corresponding to at least two different times at which light in the beam was produced, in a second selected direction that is substantially perpendicular to the first direction. The temporal distribution module may include a rotating segmented mirror.

    Abstract translation: 同时提供入射光束的波长频谱分布和时间分布的系统和方法。 光束在波长光谱分布模块处被接收，并且在横向于光束传播方向的第一选定方向中被分离成对应于至少两个不同波长的光束段。 光束也被接收在时间分布模块处，并且光束的分段对应于在基本上垂直于第一方向的第二选定方向上产生光束的至少两个不同的时间。 时间分布模块可以包括旋转的分段镜。

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