-
公开(公告)号：EP1130725A3
公开(公告)日：2003-04-02
申请号：EP00311056.6
申请日：2000-12-12
IPC分类号： H01S5/0625
CPC分类号： H01S5/06256 , H01S5/0617 , H01S5/0687
摘要： A method for controlling tuning current values provided to a multichannel laser source. For each operating laser channel, a desired slope value of laser power as a function of tuning current is stored. The slope values of laser power as a function of tuning current is then measured. The tuning current is then adjusted until a slope value substantially close to said desired slope value is measured. The operating tuning current is set for the laser source that corresponds to the measured slope value.
-
公开(公告)号：EP1059745A3
公开(公告)日：2003-01-22
申请号：EP00304633.1
申请日：2000-05-31
发明人： Ackerman, David Alan
IPC分类号： H04B10/155 , H01S5/0625
CPC分类号： H04B10/506 , H01S5/0617 , H01S5/0687 , H04B10/572
摘要： In practical WDM systems, the maximum SMSR for each channel does not necessarily occur where dP out /dI tun = 0. In fact, for most channels the maximum SMSR occurs at values of tuning current where this first derivative in not zero. In accordance with one aspect of the invention, a wavelength stabilized optical transmitter includes a DBR laser and a feedback loop for controlling the center wavelength of the laser, characterized in that the transmitter also includes a memory in which are stored the non-zero values of dP out /dI tune where the SMSR is a maximum for each of a multiplicity of different channel wavelengths and further includes a controller responsive to the stored values for delivering to the laser a level of tuning current that maximizes the SMSR for a particular channel wavelength.
-
13.发明公开
公开(公告)号：EP1184949A3
公开(公告)日：2002-09-11
申请号：EP01306728.5
申请日：2001-08-07
IPC分类号： H01S5/026 , H04B10/155
CPC分类号： H04J14/0298 , H01S5/0265 , H01S5/12 , H04B10/503 , H04B10/505 , H04B10/50575 , H04B10/5161
摘要： An optical transmitter for digitally modulated RF sub-carriers comprising an electroabsorption modulator integrated distributed feedback laser (412) for transmitting the digitally modulated RF sub-carriers (406) in the sub-octave frequency range. The negative bias is optimized for maximum carrier signal to noise ratio (CNR) which occurs when the composite triple beat (CTB) non-linear distortion is minimum that allows higher modulation index without causing any in-band distortion. A higher CNR increases the receiver sensitivity and thus more users can be served from a single transmitter or the transmitting signal can be modulated with higher order of digital modulation.
摘要翻译： 一种用于数字调制的RF子载波的光学发射器，包括集成了分布式反馈激光器（412）的电吸收调制器，用于发送亚倍频程频率范围内的数字调制的RF子载波（406）。 当复合三重拍（CTB）非线性失真最小时允许最大载波信噪比（CNR）优化负偏置，允许更高的调制指数而不引起任何带内失真。 较高的CNR增加了接收器灵敏度，因此可以从单个发射器提供更多的用户，或者可以用更高阶的数字调制来调制发射信号。
-
14.发明公开Electroabsorption modulator integrated distributed feedback laser transmitter 有权Lasertransmitter mit verteilterRückkopplungund integriertem Elektroabsorptionsmodulator
公开(公告)号：EP1184949A2
公开(公告)日：2002-03-06
申请号：EP01306728.5
申请日：2001-08-07
IPC分类号： H01S5/026 , H04B10/155
CPC分类号： H04J14/0298 , H01S5/0265 , H01S5/12 , H04B10/503 , H04B10/505 , H04B10/50575 , H04B10/5161
摘要： An optical transmitter for digitally modulated RF sub-carriers comprising an electroabsorption modulator integrated distributed feedback laser (412) for transmitting the digitally modulated RF sub-carriers (406) in the sub-octave frequency range. The negative bias is optimized for maximum carrier signal to noise ratio (CNR) which occurs when the composite triple beat (CTB) non-linear distortion is minimum that allows higher modulation index without causing any in-band distortion. A higher CNR increases the receiver sensitivity and thus more users can be served from a single transmitter or the transmitting signal can be modulated with higher order of digital modulation.
摘要翻译： 一种用于数字调制的RF子载波的光发射机，包括用于在子倍频程频率范围内发射数字调制的RF子载波（406）的电吸收调制器集成分布反馈激光器（412）。 针对最大载波信噪比（CNR）优化负偏压，当复合三节拍（CTB）非线性失真最小时，其允许更高的调制指数而不引起任何带内失真。 较高的CNR增加了接收机灵敏度，从而可以从单个发射机提供更多的用户，或者可以用更高阶的数字调制来调制发射信号。
-
15.发明公开Laser incorporating tunable grating for group velocity dispersion compensation 审中-公开激光absimmbarem光栅群速度色散补偿
公开(公告)号：EP1022824A3
公开(公告)日：2002-02-06
申请号：EP00300220.1
申请日：2000-01-13
发明人： Collings, Brandon Christopher , Eggleton, Benjamin John , Greenberg Kosonski, Sandra , Lenz, Gadi , Spalter, Stefan Heinz
CPC分类号： H01S3/1112 , H01S3/0675 , H01S3/10076 , H01S3/1053 , H01S3/1055 , H01S3/108
摘要： In accordance with the invention, a laser includes a tunable grating incorporated within the laser cavity. The grating is configured to provide GVD at wavelengths far from the photonic bandgap thus providing GVD compensation and management of intracavity dispersion. The grating is operated in the transmission mode and is configured so that reflection from within the photonic bandgap does not significantly affect the lasing condition. The grating is tunable, permitting adjustment of the intracavity GVD. In a preferred embodiment, the grating is an apodized fiber Bragg grating within the cavity of a modelocked fiber laser. The GVD of the fiber grating can be tuned by axial strain.
-
16.发明公开Dopant diffusion blocking for optoelectronic devices using InAlAs or InGaAlAs 审中-公开使用的InAlAs或InGaAlAs用于光电Vorichtungen掺杂扩散阻挡层
公开(公告)号：EP1139526A3
公开(公告)日：2002-01-16
申请号：EP01303131.5
申请日：2001-04-02
发明人： G Chu,Sung-nee , Hybertsen, Mark S. , Ougassaden, Abdallah , Akulova, Yuliya A. , Geva, Michael , Lentz, Charles W.
CPC分类号： H01S5/227 , G02F1/025 , H01S5/221 , H01S5/2213 , H01S5/2226 , H01S5/3072 , H01S5/50
摘要： A method for decreasing the diffusion of dopant atoms in the active region, as well as the interdiffusion of different types of dopant atoms among adjacent doped regions, of optoelectronic devices is disclosed. The method of the present invention employs a plurality of InAlAs and/or InGaAlAs layers to avoid the direct contact between the dopant atoms and the active region, and between the dopant atoms in adjacent blocking structures of optoelectronic devices. A semi-insulating buried ridge structure, as well as a ridge structure, in which the interdiffusion of different types of dopant atoms is suppressed are also disclosed.
-
17.发明公开Method and apparatus for reduction of electrical cross-talk and wave length chirp in a distributed bragg reflector laser 审中-公开法和用于降低电串扰干扰装置，以及波长啁啾用于与分布式布拉格反射器的激光
公开(公告)号：EP1168534A2
公开(公告)日：2002-01-02
申请号：EP01115077.8
申请日：2001-06-21
CPC分类号： H04B10/505 , H01S5/0265 , H01S5/042 , H01S5/0425 , H01S5/06256 , H04B10/503 , H04B10/58
摘要： A shunt capacitor is placed in parallel with the tuning section of a tunable electro-absorption modulated Distributed Bragg Reflector (DBR) laser. This reduces the electrical cross-talk between the modulator and tuning sections of the device. This reduction of electrical cross-talk results in a reduction of the wavelength chirp and therefore reduces the pulse distortion of a light wave traveling along an optical fiber.
摘要翻译： 分流电容器与可调谐电吸收的调谐部平行放置的调制的分布式布拉格反射器（DBR）激光器。 这降低了装置的调制器和调谐部分之间的电串扰。 这在减小波长啁啾的还原的电串扰的结果，因此降低光波沿着光纤行进的脉冲畸变。
-
公开(公告)号：EP0978912A3
公开(公告)日：2001-12-12
申请号：EP99305934.4
申请日：1999-07-26
IPC分类号： H01S5/34
CPC分类号： B82Y20/00 , H01S5/3072 , H01S5/34 , H01S5/3407
摘要： An MQW laser comprises an active region in which a multiplicity of barriers each includes a doped barrier layer separated from its adjacent quantum well layers by undoped barrier layers. In a preferred embodiment, each barrier of an InGaAsP/InP SCH MQW laser includes a p-type (e.g., Be, Mg or C) delta-doped InGaAsP barrier layer sandwiched between a pair of undoped InGaAsP barrier layers. With suitable doping concentration and thickness of the delta-doped barrier layer, we have demonstrated MQW lasers with T o as high as 82 K.
-
公开(公告)号：EP0845839B1
公开(公告)日：2001-12-12
申请号：EP97309473.3
申请日：1997-11-25
CPC分类号： H01S5/0282 , H01S5/02228 , H01S5/0287
-
20.发明公开High power, multiple-tap co-doped optical amplifier 有权Codotierter optischerHochleistungsverstärkermit Mehrfachabzweigern
公开(公告)号：EP1161008A2
公开(公告)日：2001-12-05
申请号：EP01304459.9
申请日：2001-05-21
IPC分类号： H04B10/17
CPC分类号： H01S3/06754 , H01S3/063 , H01S3/06758 , H01S3/094011 , H01S3/1608 , H01S3/1618 , H01S3/2383
摘要： A high power optical amplifier with a multiple-tap output includes a preamplifier stage (42) (such as an EDFA), followed by a power amplifier (44) comprises a concatenated set of co-doped optical amplifier stages (54). Each amplifier stage includes a tap/power extractor (60) for removing a portion of the amplified input signal, allowing for the pump signal(s) and remaining amplified input signal to be applied as an input to the following stage.
摘要翻译： 具有多抽头输出的高功率光放大器包括前置放大器级（42）（例如EDFA），其后是功率放大器（44），其包括级联的一组共掺光学放大器级（54）。 每个放大器级包括用于去除放大的输入信号的一部分的抽头/功率提取器（60），允许将泵浦信号和剩余的放大的输入信号作为输入施加到下一级。
-
-
-
-
-
-
-
-
-
搜索结果
140 条记录 (耗时 0.015 秒)
