公开(公告)号：AU7079400A

公开(公告)日：2001-04-24

申请号：AU7079400

申请日：2000-08-25

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  COLLIER ADAM K ,  DONG LIANG ,  MARRO MARLENE A ,  QI GANG

IPC: G02B6/02 ,  C03C13/04 ,  G02B5/18 ,  G02B6/036 ,  G02B6/10 ,  G02B6/16

公开(公告)号：AU6418699A

公开(公告)日：2000-05-22

申请号：AU6418699

申请日：1999-10-07

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  MODAVIS ROBERT A

IPC: G02B6/122 ,  G02B5/18 ,  G02B6/02 ,  G03F7/20 ,  G02B6/34

Abstract: Optical gratings having a range of possible Bragg wavelengths can be produced using a single phase mask by exposing the mask to a non-collimated spatially filtered beam of light. A spatial filter removes high spatial frequency components from the beam, and a focusing system directs the filtered beam to a phase mask. A rate at which the beam is focused and a spacing between the phase mask and a photo-sensitive waveguide are varied to produce gratings in the waveguide having a range of possible periods.

公开(公告)号：CA2336329A1

公开(公告)日：2000-01-13

申请号：CA2336329

申请日：1999-06-30

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  MODAVIS ROBERT A ,  COOK THOMAS A ,  ROBSON CHRISTOPHER D

IPC: G02B6/13 ,  G02B5/18 ,  G02B6/02 ,  G02B6/122 ,  G02B6/34 ,  G02B27/58 ,  G02B27/44

Abstract: Filter gratings are formed in optical waveguides (50) having photosensitive cores by exposing the cores to actinic radiation in the form of interfering beams (38, 40) having peak intensities (72, 74) that are relatively displace d along an optical axis (64) of the waveguides. Each of the interfering beams has a single-lobed intensity profile and a degree of spatial coherence required to achieve a desired fringe contrast between the two relatively displaced beams. Index modulations in the photosensitive core match the illumination (interference) pattern of the radiation. The relative displacement of the interfering beams reduces side lobes of the gratings' spectral responses by leveling the average refractive index of the index modulations. A second exposure with the two beams but without the beams' interference effects further levels the average refractive index.

公开(公告)号：WO0161871A3

公开(公告)日：2002-04-04

申请号：PCT/US0105163

申请日：2001-02-16

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  HALLOCK ROBERT ,  HARRIS JAMES M ,  MURPHY EDWARD F ,  SPOCK DEREK E

IPC: H04B10/02 ,  H04J14/00 ,  H04J14/02

CPC classification number: H04J14/0213 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0216 ,  H04J14/0221

Abstract: Methods and apparatus for combining, adding, and/or dropping channels in optical communication systems that utilize thin film filters without the creation of deadbands, using fiber Bragg gratings (316,322) and additional thin film optical filters, are described. According to one aspect of the invention, an optical filter (318) is used to drop a wavelength (328) range from an optical signal (312). Prior to the optical signal entering the optical filter, one or more fiber Bragg gratings and an optical circulator (310, 324) are used reflects a portion of the communications spectrum which would normally lie with the deadband region of the optical filter. According to another aspect of the present invention, an optical filter (320) is used to combine a first optical signal and a second optical signal to form a combined optical signal. Neither the first optical signal nor the second optical signal includes channels within a deadband region of the optical filter. One or more fiber Bragg gratings and an optical circulator or a coupler are used to add a third optical signal to the combined optical signal. The third optical signal includes signal wavelengths within the deadband region of the optical filter.

Abstract translation: 描述了使用光纤布拉格光栅（316,322）和附加的薄膜光学滤波器来组合，添加和/或丢弃利用薄膜滤波器而不产生死区的光通信系统中的信道的方法和装置。 根据本发明的一个方面，光滤波器（318）用于从光信号（312）中降低波长（328）范围。 在光信号进入光滤波器之前，使用一个或多个光纤布拉格光栅和光环行器（310,324）来反映通常与光滤波器的死区区域正常相关的通信频谱的一部分。 根据本发明的另一方面，光滤波器（320）用于组合第一光信号和第二光信号以形成组合光信号。 第一光信号和第二光信号都不包括在滤光器的死区内的通道。 使用一个或多个光纤布拉格光栅和光环行器或耦合器将第三光信号加到组合光信号上。 第三光信号包括在滤光器的死区内的信号波长。

公开(公告)号：AT481822T

公开(公告)日：2010-10-15

申请号：AT07839479

申请日：2007-10-11

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  GOLLIER JACQUES ,  HU MARTIN H ,  LOEBER DAVID A ,  RICKETTS DANIEL O

IPC: H04N9/31 ,  H01S5/0625

Abstract: Particular embodiments of the present invention relate generally to semiconductor lasers and laser scanning systems and, more particularly, to schemes for controlling semiconductor lasers. According to one embodiment of the present invention, a laser is configured for optical emission of encoded data. At least one parameter of the optical emission is a function of a drive current I GAIN injected into the gain section of the semiconductor laser and one or more additional drive currents I/V PHASE , I/V DBR . Mode selection in the semiconductor laser is altered by perturbing at least one of the additional drive currents I/V PHASE , I/V DBR with a perturbation signal I/V PTRB to alter mode selection in the semiconductor laser such that a plurality of different emission modes are selected in the semiconductor laser over a target emission period. In this manner, patterned variations in the wavelength or intensity profile of the laser can be disrupted to disguise patterned flaws that would otherwise be readily noticeable in the output of the laser.

公开(公告)号：BR9914872A

公开(公告)日：2001-07-03

申请号：BR9914872

申请日：1999-10-07

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  MODAVIS ROBERT A

IPC: G02B6/122 ,  G02B5/18 ,  G02B6/02 ,  G03F7/20 ,  G02B6/34

Abstract: Optical gratings having a range of possible Bragg wavelengths can be produced using a single phase mask by exposing the mask to a non-collimated spatially filtered beam of light. A spatial filter removes high spatial frequency components from the beam, and a focusing system directs the filtered beam to a phase mask. A rate at which the beam is focused and a spacing between the phase mask and a photo-sensitive waveguide are varied to produce gratings in the waveguide having a range of possible periods.

公开(公告)号：AU4852399A

公开(公告)日：2000-01-24

申请号：AU4852399

申请日：1999-06-30

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  COOK THOMAS A ,  MODAVIS ROBERT A ,  ROBSON CHRISTOPHER D

IPC: G02B6/13 ,  G02B5/18 ,  G02B6/02 ,  G02B6/122 ,  G02B6/34 ,  G02B27/58 ,  G02B27/44

Abstract: Filter gratings are formed in optical waveguides (50) having photosensitive cores by exposing the cores to actinic radiation in the form of interfering beams (38, 40) having peak intensities (72, 74) that are relatively displaced along an optical axis (64) of the waveguides. Each of the interfering beams has a single-lobed intensity profile and a degree of spatial coherence required to achieve a desired fringe contrast between the two relatively displaced beams. Index modulations in the photosensitive core match the illumination (interference) pattern of the radiation. The relative displacement of the interfering beams reduces side lobes of the gratings' spectral responses by leveling the average refractive index of the index modulations. A second exposure with the two beams but without the beams' interference effects further levels the average refractive index.

公开(公告)号：WO2010141555A3

公开(公告)日：2011-03-17

申请号：PCT/US2010037030

申请日：2010-06-02

Applicant: CORNING INC ,  BHATIA VIKRAM ,  PIKULA DRAGAN ,  RAJ MADHAN M

Inventor： BHATIA VIKRAM ,  PIKULA DRAGAN ,  RAJ MADHAN M

IPC: H01S3/10 ,  H01S3/13

CPC classification number: H01S5/0683 ,  G02F1/3775 ,  H01S5/0617 ,  H01S5/06256 ,  H01S5/0687 ,  H01S5/141

Abstract: A method for operating a frequency converted light source includes sweeping a wavelength control signal of a semiconductor laser over an initial signal range and measuring an optical power of an output beam emitted from a wavelength conversion device coupled to the semiconductor laser. The wavelength control signal of the semiconductor laser may then be swept over at least one truncated signal range and the optical power of the resulting output beam is measured. The at least one truncated signal range may be centered on a point corresponding to a maximum power of the output beam of the sweep of the wavelength control signal over the preceding signal range. An operational signal range for the wavelength control signal is determined such that a midpoint of the operational signal range corresponds to the maximum optical power of the resulting output beam of the sweep over the preceding signal range. Closed-loop feedback control of the wavelength control signal in the operational signal range may then be initiated.

Abstract translation: 一种用于操作频率转换的光源的方法包括在初始信号范围上扫描半导体激光器的波长控制信号，并测量从耦合到半导体激光器的波长转换器件发射的输出光束的光功率。 然后可以将半导体激光器的波长控制信号扫过至少一个截断的信号范围，并测量所得到的输出光束的光功率。 所述至少一个截断的信号范围可以在对应于在先前信号范围上的波长控制信号的扫描的输出波束的最大功率的点上居中。 确定用于波长控制信号的操作信号范围，使得操作信号范围的中点对应于在先前信号范围上的扫描的结果输出光束的最大光功率。 然后可以启动操作信号范围内的波长控制信号的闭环反馈控制。

公开(公告)号：WO02082128A3

公开(公告)日：2003-04-24

申请号：PCT/US0207766

申请日：2002-03-15

Applicant: CORNING INC

Inventor： BARTOLINI GLENN D ,  BHATIA VIKRAM ,  WIGLEY PETER G

IPC: H01S3/067 ,  H01S3/30 ,  H04B10/12

CPC classification number: H01S3/06758 ,  H01S3/302 ,  H01S2301/04

Abstract: An optical device including an optical amplifier (12) to amplify optical signals received through an optical input, and to supply the amplified optical signals from an optical output, and an optical filter component (20) to compensate for variations in the gain spectrum of the optical amplifier (12) that occur as a function of wavelength and operating temperature. The optical filter component includes a first optical filter (22) having an athermalized transmission spectrum and a second optical filter (24) having a transmission (or insertion loss) spectrum that varies as a function of operating temperature.

Abstract translation: 一种光学装置，包括：光放大器，用于放大通过光输入接收的光信号，并提供来自光输出的经放大的光信号;以及光滤波器部件，用于补偿光信号的增益谱的变化， 光放大器（12），其作为波长和工作温度的函数发生。 滤光器部件包括具有非热化透射光谱的第一滤光器（22）和具有作为工作温度的函数而变化的透射（或插入损耗）光谱的第二滤光器（24）。

公开(公告)号：EP1123520A4

公开(公告)日：2006-04-12

申请号：EP99951828

申请日：1999-10-07

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  MODAVIS ROBERT A

IPC: G02B6/122 ,  G02B5/18 ,  G02B6/02 ,  G03F7/20 ,  G02B6/34

CPC classification number: G03F7/70191 ,  G02B6/0208 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/02142 ,  G03F7/7035 ,  G03F7/70408 ,  Y10S359/90

Abstract: Optical gratings having a range of possible Bragg wavelengths can be produced using a single phase mask by exposing the mask to a non-collimated spatially filtered beam of light. A spatial filter (30) removes high spatial frequency components from the beam, and a focusing system (36) directs the filtered beam to a phase mask (40). A rate at which the beam is focused and a spacing between the phase mask and a photo-sensitive waveguide (12) are varied to produce gratings in the waveguide having a range of possible periods.

Abstract translation: 具有可能的布拉格波长范围的光栅可以使用单相掩模通过将掩模曝光到非准直的空间滤光光束来产生。 空间滤波器从波束去除高空间频率分量，并且聚焦系统将滤波的波束引导到相位掩模。 光束被聚焦的速率和相位掩模和光敏波导之间的间距被改变以在波导中产生具有可能周期范围的光栅。