公开(公告)号：JPH11191649A

公开(公告)日：1999-07-13

申请号：JP29666498

申请日：1998-10-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  BETHEA CLYDE GEORGE ,  FANG WEI-CHIAO ,  NYKOLAK GERALD ,  PEOPLE ROOSEVELT ,  SERGENT ARTHUR M ,  TANBUN-EK TAWEE ,  TSANG WON-TIEN

IPC: H01S3/10 ,  H01S5/0625 ,  H01S5/10

Abstract: PROBLEM TO BE SOLVED: To provide a broad band adjustable laser, which generates optical output signal corresponding such as to the wavelength of a wavelength division multiplexing (WDM) system, N-pieces of channels, with any one of the N-pieces of different axial modes. SOLUTION: An adjustable semiconductor laser has a gain region 12 having an MGW active region 12.1, grating DFB regions 12.2 of a uniform pitch and a first waveguide 12.3. A cavity resonance is formed of a composite reflecting region 14, which has a second MQW region 14.1 and a second waveguide 14.3, and the regions 12.2. Due to the voltage applied to this region 14, a quantum confining Stark effect is caused and as a result, the wavelength of the laser is changed.

公开(公告)号：JP2000098268A

公开(公告)日：2000-04-07

申请号：JP26975299

申请日：1999-09-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  ESPINDOLA ROLANDO PATRICIO ,  JIN SUNGHO ,  MAVOORI HAREESH ,  STRASSER THOMAS ANDREW

IPC: G02B26/00 ,  G02B6/34 ,  G02F1/01

Abstract: PROBLEM TO BE SOLVED: To obtain a device which is programmable for the purpose of a wavelength shift and dispersion correction of colors and may be latched by regulating the spacings between grating elements by the expansion or contraction of a body by a magnetic field and the consequently induced elastic strain and regulating the wavelength corresponse of the device. SOLUTION: This wavelength shift device includes a waveguide of a certain length, such as an optical fiber 11, having a grating region 12, the slender magnetostriction effect body 14 bonded along the length of the gratings 12 to the gratings in the bond region 13 and a source for exposing the body 14 to the magnetic field. A source for supplying the magnetic field, for example, a solenoid 19 is installed in proximity to the body 14 or a magnet 15 or both thereof to magnetize the magnet 15 and to distort the body 14. The body 14 is expanded or shrunk by the magnetic field, by which the elastic strain is induced in the body 14 and the spacings between the grating elements and the wavelength response of the device are regulated.

公开(公告)号：JPH11195844A

公开(公告)日：1999-07-21

申请号：JP29795498

申请日：1998-10-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  BETHEA CLYDE GEORGE ,  NYKOLAK GERALD ,  PEOPLE ROOSEVELT ,  TANBUN-EK TAWEE

IPC: H04B10/02 ,  H01S5/00 ,  H01S5/02 ,  H01S5/026 ,  H01S5/06 ,  H01S5/0625 ,  H01S5/12 ,  H01S5/125 ,  H04B10/155 ,  H04B10/18 ,  H01S3/18

Abstract: PROBLEM TO BE SOLVED: To reduce signal distortion caused by fiber nonlinearity and dispersion by comprising a semiconductor laser which allows broad band tuning, comprising an integrated internal void synthesis reflector, and adding a tuning voltage and pre-chirp. SOLUTION: A semiconductor laser 10 which allows broad band tuning comprises a gain section 12 and an internal void synthesis reflector section 14 integrated with it, and a current is supplied to the gain section 12 by a current driver 16 for generating an output signal. A DC voltage applied to the synthesis reflector section 14 by a bias source 18 is used for rough-tuning the carrier frequency of the output signal through control of phase of optical field of the void in laser, in addition, output signal is connected to a fiber with a tendency wherein the signal is internally subjected to distortion caused by non-linearity and dispersion. Further, the reflector section 14 is supplied with a pre-chirp signal of relatively low frequency and low voltage, generating relatively small wavelength deviation around a carrier frequency.

公开(公告)号：JP2001053723A

公开(公告)日：2001-02-23

申请号：JP2000177065

申请日：2000-06-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  ANDERSON JON ,  BROBERG ROBERT MARIO ,  LENZ GADI

IPC: H04J14/00 ,  H04B10/02 ,  H04B10/20 ,  H04J14/02

Abstract: PROBLEM TO BE SOLVED: To obtain an optical add/drop module to improve isolation without increasing cost and a storage loss due to increase of components in a network. SOLUTION: This optical add/drop module(OADM) is constituted by including exactly two thin film filters (TFF) with respective path band wavelength of which approximately coincide with each other in a through path. Each TFF is provided with each across-the-band isolation level to indicate the minimum isolation to be achieved in either wavelength in the path bands. Reflection characteristic curves of each of the two TFFs are at least partially complementary so that an OADM isolation level exceeds logarithmic sum of the across-the- band isolation levels of each of the TFFs.

公开(公告)号：JP2000221342A

公开(公告)日：2000-08-11

申请号：JP2000016484

申请日：2000-01-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  EGGLETON BENJAMIN JOHN ,  ESPINDOLA ROLANDO PATRICIO ,  JIN SUNGHO ,  MAVOORI HAREESH ,  ROGERS JOHN A ,  STRASSER THOMAS ANDREW

IPC: G02B5/18 ,  G02B1/10 ,  G02B6/02 ,  G02B6/34 ,  G02B26/00 ,  G02F1/01 ,  H04B10/02 ,  H04B10/18 ,  H04B10/43 ,  G02B6/10 ,  H04B10/28

Abstract: PROBLEM TO BE SOLVED: To make it possible to use an optical grating device as a device for regulatable dispersion correction and to selectively change the characteristics and performance thereof by constituting the device in such a manner that the spacings between grating elements can be changed by a variable coating when strain in an axial direction is impressed to a waveguide. SOLUTION: A movable magnet 15a is directly added to the fiber coating 14 adjacently to a grating region in order to induce the strain in the fiber. A magnet 15b which does not move is added to a fixed base material 16 or a guide rail in a bond region 13b. At this time, the magnet 15a induces the shift in a wavelength distribution having a possibility useful to some of applications of dispersion correction. When the strain in the axial direction is impressed to the waveguide by the magnet moment induced in the magnets 15a and 15b, the spacings between the grating elements may be changed by the variable coating.

公开(公告)号：JP2001053687A

公开(公告)日：2001-02-23

申请号：JP2000178071

申请日：2000-06-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  ANDERSON JON ,  BROBERG ROBERT MARIO ,  DIGIOVANNI DAVID JOHN ,  ROTTWITT KARSTEN

IPC: G02F1/35 ,  H01S3/30 ,  H04B10/17 ,  H04B10/20 ,  H04B10/213 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02 ,  H04B10/16 ,  H04L12/42

Abstract: PROBLEM TO BE SOLVED: To obtain an optical ring network which can be expanded while suppressing the whole costs relatively low by using a dual ring two-way optical fiber transmission system that mutually connects a plurality of nodes and the a hub so that a plurality of WDM channels can be established in each ring. SOLUTION: A dual ring two-way optical fiber transmission system connects a series of nodes 110 to 116 to a hub 130. A distinct wavelength channel is allocated to each of the nodes 110 to 116, and the hub 130 and the nodes performs communication along a ring 101. Adjacent nodes and the hub 130 are connected by the link of a WDM ring, a pumped link is optically connected to a pump source and a signal made to pass through the pumped link is optically amplified. Then, the pumped link undergoes a different optical gain when a signal in a different wavelength channel is made to pass through a complete path between the hub 130 including the pumped link and a corresponding node.

公开(公告)号：JP2001044944A

公开(公告)日：2001-02-16

申请号：JP2000178072

申请日：2000-06-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  ANDERSON JON ,  BROBERG ROBERT MARIO

IPC: H04B10/20 ,  H04B10/02 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/02 ,  H04L12/42

Abstract: PROBLEM TO BE SOLVED: To reduce patch panel loss applied to the traffic of another receiver by taking the optical multiplexing and demultiplexing module (OADM) of a double ring two-way optical fiber transmission system out of an electronic cabinet and arranging the optical multiplexing and demultiplexing module at a place where an access possibility is low. SOLUTION: A WDM ring has an OADM that multiplexes and demultiplexes the signal of each node in the node. The WDM ring also has a power terminal device adjusting input - output data and performing conversion between a light area and an electricity area in each node. The OADM 501 of a node is arranged at a place that is physically separated from the power terminal device and connected to the power terminal device through an optical medium. In each node, traffic that is not to the node is subjected to routing through only one housing in the in-house of a subscriber requesting connection. In the case such a housing exists, the housing includes the OADM.

公开(公告)号：JP2001036557A

公开(公告)日：2001-02-09

申请号：JP2000178068

申请日：2000-06-14

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  ANDERSON JON ,  BRINKMAN WILLIAM FRANK ,  BROBERG ROBERT MARIO

IPC: H04B10/20 ,  H04J14/00 ,  H04J14/02 ,  H04L12/42 ,  H04Q11/00

Abstract: PROBLEM TO BE SOLVED: To efficiently increase capacity of operation by connecting a series of nodes with hubs by a dual ring bi-directional optical fiber transmission system and constituting an optical additional drop module of a broad band filter like a dielectric thin film filter at each node. SOLUTION: Nodes are connected together to make a ring 101 to connect only one of optical transmission rings with three additional/drop nodes 110 to 112 and a hub 130 transmit a packet in the clockwise direction and to make a similar ring to transmit the packet in the counterclockwise direction. Each of the nodes 110 to 112 is provided with corresponding optical additional drop modules OADM 210 to 212. Namely, in a specified wavelength band corresponding to a specified widely spaced C-WAM channel, only a signal is extracted from a wavelength division multiplexed signal existing in the ring 101 and inserted into the same wavelength band and a C-WDM channel so as to be returned on the ring 101.

公开(公告)号：JP2000221339A

公开(公告)日：2000-08-11

申请号：JP2000016436

申请日：2000-01-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  EGGLETON BENJAMIN JOHN ,  ROLAND PATRICIO ESPINDRA ,  JIN SUNGHO ,  MAVOORI HAREESH ,  ROGERS JOHN A ,  STRASSER THOMAS ANDREW

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/34 ,  G02B26/00 ,  G02F1/01 ,  H01S3/10 ,  H04B10/18 ,  G02B6/10

Abstract: PROBLEM TO BE SOLVED: To make it possible to produce a grating device having a wide band width, freely regulatable dispersibility and amplitude responsiveness by adding an extrinsic gradient to a waveguide and changing the range of the chirp in an intrinsic chirp type grating region. SOLUTION: The grating device 10 is manufactured by providing the device with the waveguide of a certain length like an optical fiber 11 having a grating region 12 in the waveguide. The grating region 12 has nonuniformly parted fluctuation parts and reflects the intrinsic chirp type grating. When the extrinsic gradient or force is impressed to the waveguide, the range of the chirp changes. First and second magnetic elements 15a and 15b attracts or repels to or from each other to introduce an elastic strain to the optical fiber 11 of the grating region. A gradient forming main body 14 is mounted on the optical fiber 11. As a result, the device which can include the grating of a certain range and the wide band width may be formed by using low temperature and weak force. The regulation of the dispersibility and amplitude responsiveness of the grating is possible as well.

公开(公告)号：JPH11243255A

公开(公告)日：1999-09-07

申请号：JP29795298

申请日：1998-10-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ADAMS LAURA ELLEN ,  BETHEA CLYDE GEORGE ,  NYKOLAK GERALD ,  PEOPLE ROOSEVELT ,  TANBUN-EK TAWEE

IPC: H04J14/00 ,  H01S5/00 ,  H01S5/02 ,  H01S5/026 ,  H01S5/06 ,  H01S5/0625 ,  H01S5/12 ,  H01S5/50 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04J7/00 ,  H04J14/02

Abstract: PROBLEM TO BE SOLVED: To provide a wide-band, tunable semiconductor laser transmitter capable of realizing multiplexing of subcarriers. SOLUTION: A laser transmitter 10 makes routing a signal with three hierarchical levels. The signal route is discriminated on the basis of N number of wavelength division multiplexed(WDM) wavelength channels at a first level, m amplitude modulation(AM) subcarrier frequency channels at a second level, and n frequency modulation(FM) subcarrier frequency channels at a third level. Since an adjustment voltage is used to roughly adjust the wavelengths of N number of WDM channels, an FM dither signal is used to generate additional m number of channels via FM-SCM (subcarrier multiplexing). An AM dither signal is similarly used to generate additional n number of channels via AM- SCM.