利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

37 条记录 (耗时 0.029 秒)

    Resonant pumped short cavity fiber laser with optical feedback stabilization
    3.
    发明授权
    Resonant pumped short cavity fiber laser with optical feedback stabilization 失效
    具有光反馈稳定性的谐振泵浦短腔光纤激光器

    公开(公告)号：US06301272B1

    公开(公告)日：2001-10-09

    申请号：US09505000

    申请日：2000-02-15

    申请人： Thomas L. Koch ,  Robert Waarts

    发明人： Thomas L. Koch ,  Robert Waarts

    IPC分类号： H01S330

    CPC分类号： H01S3/0941 ,  H01S3/0675 ,  H01S3/08086 ,  H01S3/13 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/23 ,  H01S3/2383

    摘要： A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg reflector (DBR) type construction, and may be combined with signal reflection apparatus of either DFB or DBR type construction that provides oscillation of the desired laser output wavelength. If used without a signal reflection apparatus, the invention may be operated as a resonant pumped fiber amplifier. A resonant pumped laser may use a wavelength stabilized pump source to maximize pumping efficiency, the stabilization being provided by optical feedback.

    摘要翻译： 光纤激光器或光纤放大器通过提供在包括泵浦增益介质的泵浦波长处建立谐振器腔的泵谐振器来使用增益介质的谐振泵浦。 泵谐振器可以是分布式反馈（DFB）或分布式布拉格反射器（DBR）型结构，并且可以与提供所需激光输出波长的振荡的DFB或DBR型结构的信号反射装置组合。 如果在没有信号反射装置的情况下使用，本发明可以作为谐振泵浦光纤放大器来操作。 谐振泵浦激光器可以使用波长稳定的泵浦源来最大化泵浦效率，由光学反馈提供稳定性。

    Thermal compensators for waveguide DBR laser sources
    4.
    发明授权
    Thermal compensators for waveguide DBR laser sources 失效
    用于波导DBR激光源的热补偿器

    公开(公告)号：US5870417A

    公开(公告)日：1999-02-09

    申请号：US822467

    申请日：1997-03-21

    申请人： Jean-Marc Verdiell ,  Robert J. Lang ,  Thomas L. Koch ,  Mehrdad Ziari

    发明人： Jean-Marc Verdiell ,  Robert J. Lang ,  Thomas L. Koch ,  Mehrdad Ziari

    IPC分类号： G02B6/12 ,  G02B6/42 ,  H01S5/026 ,  H01S5/10 ,  H01S5/12 ,  H01S5/14 ,  H01S5/40 ,  H01S3/10

    CPC分类号： H01S5/146 ,  G02B6/12007 ,  G02B6/42 ,  H01S5/02252 ,  H01S5/026 ,  H01S5/0261 ,  H01S5/1014 ,  H01S5/106 ,  H01S5/1064 ,  H01S5/1212 ,  H01S5/1225 ,  H01S5/4025 ,  H01S5/4087

    摘要： A waveguide DBR laser or waveguide DBR laser array may be comprised of a semiconductor gain element, or a series of semiconductor gain elements, in combination with a waveguide grating functioning as a resonant cavity end reflector for lasing operation comprising either an optical fiber having a fiber grating (fiber DBR laser) or a planar waveguide (planar waveguide DBR laser). The gain element may be comprised of a laser diode which has high efficient AR coating on its front facet so that it functions as a modulated gain element in a resonant cavity established between its rear HR facet and the grating formed in the external waveguide. Disclosed are ways to form this resonant cavity so that gain element modulation rates can be carried out in excess of 2 Gb/sec with suppression of longitudinal mode hops and/or with trimming to compensate for wavelength changes, rendering the waveguide DBR laser or waveguide DBR laser array highly suitable for WDM transmitter, dense WDM transmission systems and other communications applications.

    摘要翻译： 波导DBR激光器或波导DBR激光器阵列可以由半导体增益元件或一系列半导体增益元件组成，其与用作激光器操作的谐振腔端反射器的波导光栅组合，包括具有光纤的光纤 光纤（光纤DBR激光）或平面波导（平面波导DBR激光）。 增益元件可以由其前面具有高效AR涂层的激光二极管组成，使得其作为在其后HR面与形成在外部波导中的光栅之间建立的谐振腔中的调制增益元件起作用。 公开了形成这种谐振腔的方法，使得增益元件调制速率可以超过2Gb / s，抑制纵模跳跃和/或用修整来补偿波长变化，使得波导DBR激光器或波导DBR 激光阵列非常适合WDM发射机，密集WDM传输系统等通信应用。

    Optical modulators as monolithically integrated optical isolators
    5.
    发明授权
    Optical modulators as monolithically integrated optical isolators 失效
    光调制器作为单片集成光隔离器

    公开(公告)号：US5663824A

    公开(公告)日：1997-09-02

    申请号：US146653

    申请日：1993-11-02

    申请人： Thomas L. Koch ,  Fumio Koyama ,  Kang-Yih Liou

    发明人： Thomas L. Koch ,  Fumio Koyama ,  Kang-Yih Liou

    IPC分类号： G02F1/01 ,  G02F1/025 ,  H01L27/15 ,  H01S3/00 ,  H01S5/026 ,  H01S5/0625 ,  H01S5/50 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152

    CPC分类号： G02F1/0121 ,  H01S3/0064 ,  H01S5/0625 ,  G02F1/025 ,  H01S5/0265

    摘要： An apparatus and technique for providing isolation for a signal source utilizing two or more modulators is described. In particular, the apparatus generates a timed sequence of "open gates" that are synchronized to the data signal which permit transmission in a forward direction, and which attenuate a reverse direction signal. Another embodiment attenuates primarily reflected light signals by utilizing a passive waveguide and a modulator. The passive waveguide provides a propagation delay such that signals reflected from its end facet are attenuated by the modulator. The apparatus is suitable for use as an isolator for a light source in a high-speed optical fiber data transmission system.

    摘要翻译： 描述了利用两个或多个调制器为信号源提供隔离的装置和技术。 特别地，该装置产生与允许向前传输的数据信号同步的“开门”定时序列，并且使反方向信号衰减。 另一实施例通过利用无源波导和调制器主要衰减反射光信号。 无源波导提供传播延迟，使得从其端面反射的信号被调制器衰减。 该装置适用于高速光纤数据传输系统中的光源隔离器。

    Inline diplex lightwave transceiver
    6.
    发明授权
    Inline diplex lightwave transceiver 失效
    在线双工光波收发器

    公开(公告)号：US5031188A

    公开(公告)日：1991-07-09

    申请号：US516413

    申请日：1990-04-30

    申请人： Thomas L. Koch ,  Herwig Kogelnik ,  Uziel Koren

    发明人： Thomas L. Koch ,  Herwig Kogelnik ,  Uziel Koren

    IPC分类号： H01S3/10 ,  G02B6/42 ,  H01S5/00 ,  H01S5/026 ,  H01S5/062 ,  H01S5/12 ,  H01S5/125 ,  H04B10/24 ,  H04J14/00 ,  H04J14/02

    CPC分类号： H01S5/0262 ,  G02B6/4246 ,  H01S5/125 ,  H01S5/0264 ,  H01S5/0622 ,  H01S5/12

    摘要： Full duplex lightwave communications is achieved in a diplex transceiver realized in a semiconductor photonic integrated circuit having an inline interconnecting waveguide integral with the transmitting and receiving portions of the transceiver. Semiconductor lasers and detectors operating in different wavelength regimes permit diplex or wavelength-division-multiplexed operation. In the transceiver, lightwave signals from the laser propagate through the laser without interfering with the laser operation or the lightwave signals being generated.

    摘要翻译： 在具有与收发器的发射和接收部分成一体的在线互连波导的半导体光子集成电路中实现的双工收发器中实现全双工光波通信。 以不同波长方式工作的半导体激光器和检测器允许双重或波分复用操作。 在收发器中，来自激光器的光波信号传播通过激光器，而不会干扰激光器操作或产生光波信号。

    Tunable narrowband receiver utilizing distributed Bragg reflector laser structure
    7.
    发明授权
    Tunable narrowband receiver utilizing distributed Bragg reflector laser structure 失效
    可调窄带接收机利用分布式布拉格反射激光器结构

    公开(公告)号：US5020153A

    公开(公告)日：1991-05-28

    申请号：US308174

    申请日：1989-02-08

    申请人： Fow-Sen Choa ,  Thomas L. Koch

    发明人： Fow-Sen Choa ,  Thomas L. Koch

    IPC分类号： H01S3/10 ,  H01S5/00 ,  H01S5/0625 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28

    CPC分类号： H04B10/43 ,  H01S5/0028 ,  H01S5/06256

    摘要： A lightwave communication system is disclosed in which an integrated receiver is realized as a distributed Bragg reflector (MQW-DBR) laser structure biased at or below threshold. The receiver functions simultaneously as a tunable filter, optical amplifier, photodetector, and, if desired, as an FSK discriminator. It is also disclosed that the lightwave receiver also is capable of half duplex operation as a lightwave transmitter using the same DBR laser structure. The disclosed receiver eliminates complex coupling of the many different element realized by the integrated, multifunction structure.

    摘要翻译： 公开了一种光波通信系统，其中集成接收机被实现为偏置在或低于阈值的分布式布拉格反射器（MQW-DBR）激光器结构。 接收器作为可调谐滤波器，光放大器，光电检测器以及如果需要，作为FSK鉴别器同时工作。 还公开了光波接收机还能够作为使用相同的DBR激光器结构的光波发射机进行半双工操作。 所公开的接收器消除了由集成的多功能结构实现的许多不同元件的复杂耦合。

    Method of making tapered semiconductor waveguides
    8.
    发明授权
    Method of making tapered semiconductor waveguides 失效
    制造锥形半导体波导的方法

    公开(公告)号：US4944838A

    公开(公告)日：1990-07-31

    申请号：US389074

    申请日：1989-08-03

    申请人： Thomas L. Koch ,  Uziel Koren

    发明人： Thomas L. Koch ,  Uziel Koren

    IPC分类号： G02B6/136 ,  H01L21/306 ,  H01S5/323

    CPC分类号： H01L21/30612 ,  G02B6/136 ,  H01S5/32391

    摘要： Adiabatic mode control and structural reproducibility are achieved by a tapered semiconductor waveguide structure wherein semiconductor guiding layers are interleaved with stop-etch layers and each guiding layer extends further along the propagation axis of the waveguide further than the guiding layer immediately adjacent thereabove to create a staircase-like core or guiding structure. Cladding regions of appropriate semiconductor material having a lower index of refraction than the tapered core structure may be added to completely surround the tapered guiding structure. The profile of the tapered structure is realizable as any desired staircase-like shape such as linear, parabolic, exponential or the like. Additional layers of higher index of refraction semiconductor material may be included in the cladding region to permit additional beam shaping of the expanded spatial mode propagating along the tapered waveguide.Photolithographic masks defining successively larger exposed areas are aligned, deposited over the waveguide structure, and then removed following each etching step. Material selective etching techniques are employed to remove exposed (unmasked) portions of guiding layers. In sequence, the exposed, formerly underlying portions of the stop-etch layers are then removed using material selective etching. Iteration of the above process steps permits a tapered waveguide structure to be defined.

    摘要翻译： 绝热模式控制和结构再现性通过锥形半导体波导结构实现，其中半导体引导层与停止蚀刻层交错，并且每个引导层沿着波导的传播轴进一步延伸，远离其上方紧邻的引导层，以产生阶梯 型芯或引导结构。 可以添加具有比锥形芯结构更低的折射率的适当的半导体材料的包层区域以完全包围锥形引导结构。 锥形结构的轮廓可实现为任何所需的阶梯状形状，例如线性，抛物线形，指数型等。 可以在包层区域中包含更高折射率的折射率半导体材料的附加层，以允许沿着锥形波导传播的扩展空间模式的附加束成形。 定义连续较大的暴露区域的光刻掩模对准，沉积在波导结构上，然后在每个蚀刻步骤之后被移除。 使用材料选择性蚀刻技术来去除引导层的暴露（未掩蔽）部分。 顺序地，然后使用材料选择性蚀刻去除停止蚀刻层的暴露的先前的下面的部分。 上述工艺步骤的迭代允许限定锥形波导结构。