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1. 发明公开

EP1004907A2 Optical wavelength demultiplexer 有权
标题翻译： OptischerWellenlängen-Demultiplexer
公开(公告)号：EP1004907A2
公开(公告)日：2000-05-31
申请号：EP99114619.2
申请日：1999-07-26
申请人： Hewlett-Packard Company
发明人： Lemoff, Brian E. , Aronson, Lewis B.
IPC分类号： G02B6/293
CPC分类号： G02B6/2938 , G02B6/29367 , G02B6/4214 , G02B6/4215
摘要： A demultiplexer (10) includes a unitary optically transparent structure (14) that utilizes focusing relay mirrors (30, 32, and 36) to relay a multi-wavelength beam of light among a series of wavelength-specific interference filters (20, 22, 24, and 26), with each filter separating out a specific wavelength component from the multi-wavelength beam. The relay mirrors are focusing mirrors, so that the demultiplexer can be operated with a non-collimated light beam in a manner that controls the potentially large angle of divergence of non-collimated light, while taking advantage of the small beam diameter in order to create a demultiplexer with greater miniaturization.
摘要翻译：解复用器（10）包括整体的光学透明结构（14），其使用聚焦中继镜（30,32和36）来中继一系列波长特异性干涉滤光器（20,22，和36）中的多波长光束， 24和26），每个滤光器从多波长光束分离特定波长分量。继电器镜是聚焦镜，使得解复用器可以以非准直光束操作，以便控制非准直光的潜在大的发散角，同时利用小光束直径来产生具有更大的小型化的解复用器。

2. 发明公开

EP0877264A3 An improved optical waveguide device for wavelength demultiplexing and waveguide crossing 失效
标题翻译：为Wellenlängedemultiplexer和交叉波导的光波导器件
公开(公告)号：EP0877264A3
公开(公告)日：1999-10-06
申请号：EP98105565.0
申请日：1998-03-26
申请人： Hewlett-Packard Company
发明人： Lemoff, Brian E. , Aronson, Lewis B.
IPC分类号： G02B6/293 , G02B6/25
CPC分类号： G02B6/29367 , G02B6/125 , G02B6/2938 , G02B6/4204 , G02B6/4214 , G02B6/4246 , G02B2006/12195
摘要： A zigzag waveguide device (31) is described that includes at least two optical waveguides (32, 34) converged at a vertex to form a waveguide overlap region (33). Optical loss in the waveguide overlap region (33) is minimized by including a narrow gap of lower refractive index between the overlap region (33) and each waveguide (31, 32). This technique is also applied to minimize loss in a region (63) where two optical waveguides (61, 62) cross one another. A mirror (36) or optical filter (127a,-127d) reflectively couples the two waveguides (32, 34) at the vertex (33). When the coupling is provided by an optical filter (127a-127d), some range of wavelengths is transmitted out of the zigzag waveguide device (31), rather than reflected. The transmitted light may be collected by an output waveguide (126a-126d) which is wider than the waveguides (32, 34) to minimize loss due to divergence. Light exiting the device (31) may be coupled directly to a photodetector (141) with no intervening optical fiber. In addition, the width of an input waveguide (48) of the zigzag waveguide device is tapered to reduce angular spread of the light in the zigzag device (31).

3. 发明公开

EP0788010A1 Polarization-independent acousto-optical tunable filter 失效
标题翻译：一种偏振独立的声光可调谐滤波器
公开(公告)号：EP0788010A1
公开(公告)日：1997-08-06
申请号：EP97300363.5
申请日：1997-01-21
申请人： Hewlett-Packard Company
发明人： Chang, Kok-Wal , Aronson, Lewis B.
IPC分类号： G02F1/125
CPC分类号： G02F1/125
摘要： A polarization independent acousto-optical tunable filter (AOTF). The AOTF is fabricate with two waveguides [33] [35] formed on a single substrate [31]. An incoming polarization independent beam of light is split into TE and TM optical components with a walk-off crystal [37] wherein each optical component is coupled into a different one of the two waveguides [33] [35]. The AOTF can be formed to provide two stages of filtering. The two stages of filtering can be realized be providing two successive stages or by passing the optical signal through the same filter twice. Various configurations are obtained by placing TM and TE polarizers within the optical path traveled by the incoming beam of light.

4. 发明公开

EP0955738A3 Polarization based differential receiver for reduction of background noise in free-space optical links 有权
标题翻译：基于偏振为背景噪声的光学化合物中的自由空间中的抑制差分接收器
公开(公告)号：EP0955738A3
公开(公告)日：2004-02-04
申请号：EP98122692.1
申请日：1998-11-30
申请人： Hewlett-Packard Company, A Delaware Corporation
发明人： Aronson, Lewis B.
IPC分类号： H04B10/10
CPC分类号： H04B10/11 , H04B10/532
摘要： An optical link[10,100] includes a transmitter[30, 150] and a receiver[40, 140] for sending and receiving data across a free-space link or any other link in which a high level of background light may be present. The transmitter[30, 150] includes a source of circularly polarized light having a predetermined wavelength. The source is modulated to transmit data. The receiver[40, 140] includes a circuit for generating a signal indicative of the difference in intensity of left-handed circularly polarized light and right-handed circularly polarized light incident on the receiver[40, 140]. In one embodiment of the invention, the receiver[40, 140] includes a first polarization filter[15, 115] for blocking left-handed circularly polarized light of the predetermined wavelength and a second polarization filter[16, 116] for blocking right-handed circularly polarized light of the predetermined wavelength, the filters being displaced from one another. A first detector[17, 117] measures the intensity of light leaving the first polarization filter[15, 115], and a second detector[18, 118] measures the intensity of light leaving the second polarization filter[16, 116]. The circularly polarized light source may be generated from a linearly polarized light source by passing the linearly polarized light through a ¼ waveplate[13]. Similarly, a polarization filter for blocking light of a predetermined circular polarization may be constructed by passing the light through a ¼ waveplate[13] and a linear polarization filter. In one embodiment of the present invention, the transmitter[30, 150] modulates the source of circularly polarized light by changing the direction of polarization of the source of circularly polarized light.

5. 发明公开

EP0877264A2 An improved optical waveguide device for wavelength demultiplexing and waveguide crossing 失效
标题翻译： Optische WellenleitervorrichtungfürWellenlängedemultiplexerund Wellenleiterkreuzung
公开(公告)号：EP0877264A2
公开(公告)日：1998-11-11
申请号：EP98105565.0
申请日：1998-03-26
申请人： Hewlett-Packard Company
发明人： Lemoff, Brian E. , Aronson, Lewis B.
IPC分类号： G02B6/293 , G02B6/25
CPC分类号： G02B6/29367 , G02B6/125 , G02B6/2938 , G02B6/4204 , G02B6/4214 , G02B6/4246 , G02B2006/12195
摘要： A zigzag waveguide device (31) is described that includes at least two optical waveguides (32, 34) converged at a vertex to form a waveguide overlap region (33). Optical loss in the waveguide overlap region (33) is minimized by including a narrow gap of lower refractive index between the overlap region (33) and each waveguide (31, 32). This technique is also applied to minimize loss in a region (63) where two optical waveguides (61, 62) cross one another. A mirror (36) or optical filter (127a,-127d) reflectively couples the two waveguides (32, 34) at the vertex (33). When the coupling is provided by an optical filter (127a-127d), some range of wavelengths is transmitted out of the zigzag waveguide device (31), rather than reflected. The transmitted light may be collected by an output waveguide (126a-126d) which is wider than the waveguides (32, 34) to minimize loss due to divergence. Light exiting the device (31) may be coupled directly to a photodetector (141) with no intervening optical fiber. In addition, the width of an input waveguide (48) of the zigzag waveguide device is tapered to reduce angular spread of the light in the zigzag device (31).
摘要翻译：描述了一种锯齿形波导器件（31），其包括会聚在顶点处以形成波导重叠区域（33）的至少两个光波导（32,34）。通过在重叠区域（33）和每个波导（31,32）之间包括较低折射率的窄间隙，使波导重叠区域（33）中的光学损耗最小化。该技术也适用于使两个光波导（61,62）彼此交叉的区域（63）中的损耗最小化。反射镜（36）或滤光器（127a，-127d）在顶点（33）处反射耦合两个波导（32,34）。当耦合由滤光器（127a-127d）提供时，一些波长范围从Z形波导器件（31）传出，而不是被反射。可以通过比波导（32,34）宽的输出波导（126a-126d）来收集透射光，以最小化由于发散引起的损耗。离开设备（31）的光可以直接耦合到光电检测器（141），而没有中间的光纤。此外，之字形波导器件的输入波导（48）的宽度是锥形的，以减少光在锯齿形器件（31）中的角度扩展。

6. 发明公开

EP0798589A2 Acousto-optical filters 失效
标题翻译： Akusto-optischer过滤器
公开(公告)号：EP0798589A2
公开(公告)日：1997-10-01
申请号：EP97302159.5
申请日：1997-03-27
申请人： Hewlett-Packard Company
发明人： Aronson, Lewis B.
IPC分类号： G02F1/125
CPC分类号： G02F1/125
摘要： An acousto-optical filter (AOTF) having reduced sidelobes is fabricated with a waveguide (34) formed on a substrate along an optical axis (42), an incoming beam of light being coupled into the waveguide (34) and an acoustic wave beam (36) being induced by an interdigitated transducer (32). The acoustic wave beam (36) follows an acoustic wave beam axis (45) which crosses the optical axis (42). The transducer (32) is driven by an externally-generated electric signal. The frequency of the acoustic wave beam (36) is determined by the frequency of the electric signal. The acoustic wave beam (36) induces a diffraction grating in the waveguide (34) as the acoustic wave beam (36) crosses the optical axis (42), and this in turn diffracts the beam of light. The grating couples the transverse electric and transverse magnetic polarization modes of the light, but only within a narrow band of optical wavelengths. The cross-section of the intensity of the acoustic wave beam (36) can be tapered to further reduce the sidelobes of the passband defined by the frequency of the surface acoustic wave beam (36).
摘要翻译：滤光器包括适于接收入射光束的声光材料的基部。基座具有沿着光轴横穿基座的光波导。换能器响应于电信号以在基座中感应声波波束。换能器（32）响应于来自信号源（35）的电信号以在基座（30）中感应声波束（36）。声波束（36）沿着声波波束轴（45）从换能器（32）发出。声波束可操作以改变通过声波束传播的任何光的偏振模式，并且具有由声波束的频率和基底（30）的光学特性限定的光频带内的频率。

7. 发明公开

EP0955738A2 Polarization based differential receiver for reduction of background noise in free-space optical links 有权
标题翻译：基于偏振为背景噪声的光学化合物中的自由空间中的抑制差分接收器
公开(公告)号：EP0955738A2
公开(公告)日：1999-11-10
申请号：EP98122692.1
申请日：1998-11-30
申请人： HEWLETT-PACKARD COMPANY
发明人： Aronson, Lewis B.
IPC分类号： H04B10/10
CPC分类号： H04B10/11 , H04B10/532
摘要： An optical link[10,100] includes a transmitter[30, 150] and a receiver[40, 140] for sending and receiving data across a free-space link or any other link in which a high level of background light may be present. The transmitter[30, 150] includes a source of circularly polarized light having a predetermined wavelength. The source is modulated to transmit data. The receiver[40, 140] includes a circuit for generating a signal indicative of the difference in intensity of left-handed circularly polarized light and right-handed circularly polarized light incident on the receiver[40, 140]. In one embodiment of the invention, the receiver[40, 140] includes a first polarization filter[15, 115] for blocking left-handed circularly polarized light of the predetermined wavelength and a second polarization filter[16, 116] for blocking right-handed circularly polarized light of the predetermined wavelength, the filters being displaced from one another. A first detector[17, 117] measures the intensity of light leaving the first polarization filter[15, 115], and a second detector[18, 118] measures the intensity of light leaving the second polarization filter[16, 116]. The circularly polarized light source may be generated from a linearly polarized light source by passing the linearly polarized light through a ¼ waveplate[13]. Similarly, a polarization filter for blocking light of a predetermined circular polarization may be constructed by passing the light through a ¼ waveplate[13] and a linear polarization filter. In one embodiment of the present invention, the transmitter[30, 150] modulates the source of circularly polarized light by changing the direction of polarization of the source of circularly polarized light.
摘要翻译：一种光学linkÄ10,100Ü包括transmitterÄ30，150U和一个receiverÄ40，140UE用于发送和跨越自由空间链路或其中的背景光的高电平可能存在的任何其它链路接收数据。的transmitterÄ30，150U包括具有预定的波长的圆偏振光的光的来源。源被调制成传输数据。的receiverÄ40，140UE包括用于产生表示在所述receiverÄ40，140UE在左旋圆偏振光和右旋圆偏振光入射的强度差的信号的电路。在本发明的一个实施例中，receiverÄ40，140UE包括第一偏振filterÄ15，115U用于阻挡预定波长和第二偏振filterÄ16，116U用于阻挡预定波长的右旋圆偏振光的左圆偏振光，滤波器彼此移位。第一detectorÄ17，117Ü测量光离开第一偏振filterÄ15，115U强度，以及第二detectorÄ18，118U测量光离开第二偏振filterÄ16，116U强度。圆偏振光源可以从通过使直线偏振光通过1/4waveplateÄ13Ü的直线偏振光的光源来产生。类似地，用于阻挡在预定的圆偏振的光的偏振滤光器可通过使光穿过1/4waveplateÄ13Ü和线性偏振滤光器来构造。在本发明的一个实施例中，transmitterÄ30，150U通过改变圆偏振光的光源的偏振方向进行调制圆偏振光的来源。

8. 发明公开

EP1009032A1 System and method for the monolithic integration of a light emitting device and a photodetector using a native oxide semiconductor layer 审中-公开
标题翻译：系统和方法，用于使用本机半导体氧化物的发光器件的单片集成和光检测器
公开(公告)号：EP1009032A1
公开(公告)日：2000-06-14
申请号：EP99116407.0
申请日：1999-08-20
申请人： Hewlett-Packard Company
发明人： Aronson, Lewis B. , Tan, Michael R.T. , Corzine, Scott W. , Babic, Dubravko I
IPC分类号： H01L27/15 , H01S5/026
CPC分类号： H01S5/0264 , H01L27/15 , H01S5/0425 , H01S5/183 , H01S5/2027
摘要： A laser and photodetector combination (100, 200, 300, 400) having a structure in which the layer of the photodetector (110, 210, 310, 410) that contacts the laser (120, 220, 320, 420) is separated from the laser by a native semiconductor oxide layer (115, 215, 315, 415) that is both insulating and has a refractive index lower than that of the laser (120, 220, 320, 420) and the photodetector (110, 210, 310, 410). This configuration results in a laser and photodetector structure (100, 200, 300, 400) that minimizes the capture of the spontaneous emission light output from the laser (120, 220, 320, 420) by the photodetector (110, 210, 310, 410) while electrically isolating the laser from the photodetector. The electrical isolation of the laser from the photodetector results in a four terminal device in which the laser and photodetector(100, 200, 300, 400) may be independently biased, and can therefore be operated at a very low bias voltage.
摘要翻译：激光器和光电检测器组合（100，200，300，400）具有在光检测器（110，210，310，410）的层没有接触所述激光器（120，220，320，420）的结构被从分离激光由天然半导体氧化物层（115，215，315，415），既绝缘且具有折射率比所述激光器（120，220，320，420）和光电检测器（110，210，310的下部， 410）。在一个激光器和光电检测器结构该配置的结果（100，200，300，400）做了最大限度地减少自发发射的光输出的捕获从激光器（120，220，320，420）由所述光电检测器（110，210，310， 410），而电隔离的光检测器的激光。从在其中激光器和光电检测器（100，200，300，400）可以是unabhängig偏置，并且可以以非常低的偏置电压THEREFORE操作的四端器件的光检测器的结果，激光的电隔离。

9. 发明公开

EP0695963A1 Acousto-optical tunable filter and a laser tuned by it 失效
标题翻译： Akustooptischer abstimmbarer过滤器和灭火器
公开(公告)号：EP0695963A1
公开(公告)日：1996-02-07
申请号：EP95305197.6
申请日：1995-07-25
申请人： Hewlett-Packard Company
发明人： Aronson, Lewis B.
IPC分类号： G02F1/125 , G02F1/035 , H01S3/106
CPC分类号： G02F1/125 , G02F1/035 , G02F2201/12 , G02F2203/055 , H01S3/083 , H01S3/1068
摘要： An acousto-optic tunable filter ("AOTF") with a pair of electrodes (115, 117) on opposite sides of the waveguide (107). A voltage source (119) applies a potential across the electrodes, thereby creating an electric field through the waveguide. The electric field controls an optical property of the waveguide by altering the birefringence of the waveguide. Suitably adjusting the potential applied by the voltage source results in suppression of sidelobes, correction of asymmetric sidelobes, and compensation for physical variations in the waveguide. The AOTF can be tuned very rapidly by a tuning voltage applied to the electrodes. In combination with a thermistor (199, 211), the control voltage can compensate for changes in temperature. A spatially-varying electric field is generated by using a set of electrodes (177, 179, 181) at different potentials, or by using a resistive element (183) as an electrode, or by shaping the electrodes (185, 187, 195, 197) according to the desired field. A rapidly-varying control voltage can modulate a light beam in the filter. The AOTF finds an application as the tuning element of an external-cavity tunable laser.
摘要翻译：滤光器包括适于接收入射光束的双折射声光材料的基部。换能器响应于电信号以在基座中感应出声波。声波可操作地改变通过基底传播的任何光的偏振模式。声波具有由声波的频率和基底的光学特性限定的光频带内的频率，但不改变具有在光频带外的频率的任何光的偏振模式。提供了一种控制装置，用于通过调节声光材料的双折射来控制基座的光学特性。

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