公开(公告)号：DE69903372D1

公开(公告)日：2002-11-14

申请号：DE69903372

申请日：1999-04-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FREDERICO ,  YI CHO ALFRED ,  FAIST JEROME ,  GMACHL CLAIRE F ,  HUTCHINSON ALBERT LEE ,  SIVCO DEBORAH LEE ,  TREDICUCCI ALESSANDRO

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/30 ,  H01S5/34 ,  H01S5/343

Abstract: A novel superlattice quantum cascade (SLQC) laser has undoped SL active regions, with the dopant concentration in the injector region being selected, such that, under an appropriate electrical bias, the SL active region is substantially electric field free. The absence of dopant atoms in the SL active region results in reduced carrier scattering and reduced optical losses, with consequent low threshold current and/or room temperature operation. The novel laser emits in the mid-IR spectral region and can be advantageously used in measurement or monitoring systems, e.g., in pollution monitoring systems.

公开(公告)号：CA2348005A1

公开(公告)日：2002-05-08

申请号：CA2348005

申请日：2001-05-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHU SUNG-NEE GEORGE ,  CHO ALFRED YI ,  HUTCHINSON ALBERT LEE ,  GMACHL CLAIRE F ,  WANKE MICHAEL CLEMENT ,  CAPASSO FEDERICO ,  TREDICUCCI ALESSANDRO ,  SERGENT ARTHUR MIKE ,  SIVCO DEBORAH LEE

IPC: H01S5/343 ,  H01S5/34

Abstract: The RT regions of an ISB light emitter comprise pre-biased SLs and a multiplicity of split quantum wells (SPQWs). A SPQW is a quantum well that i s divided into a multiplicity of sub-wells by a first barrier layer sufficiently thin that the upper and lower energy states are split beyond their natural broadening and contribute to different minibands in each RT region. In contrast, adjacent SPQWs are coupled to one another by second barrier layers. The thicknesses of the latter layers are chosen so that minibands are created across each RT region. In one embodiment, the emitter includes an I/R region between adjacent RT regions, and in another embodiment the I/R regions are omitted.

公开(公告)号：DE69700103D1

公开(公告)日：1999-03-11

申请号：DE69700103

申请日：1997-10-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  FAIST JEROME ,  CHO ALFRED YI ,  HUTCHINSON ALBERT LEE ,  SCAMARCIO GAETANO ,  SIRTORI CARLO ,  SIVCO DEBORAH LEE

IPC: H01S5/00 ,  H01S5/34 ,  H01S5/343 ,  H01S3/18

公开(公告)号：CA2364797C

公开(公告)日：2006-04-25

申请号：CA2364797

申请日：2001-12-11

Applicant: LUCENT TECHNOLOGIES INC ,  TRUSTEES STEVENS INST TECH

Inventor： CAPASSO FEDERICO ,  BETHEA CLYDE GEORGE ,  SIVCO DEBORAH LEE ,  CHO ALFRED YI ,  HUTCHINSON ALBERT LEE ,  MARTINI RAINER ,  TREDICUCCI ALESSANDRO ,  PAIELLA ROBERTO ,  GMACHL CLAIRE F ,  WHITTAKER EDWARD ANTHONY

IPC: H01S5/042 ,  H04B10/10 ,  H01S5/06 ,  H04B10/00 ,  H04B10/04 ,  H04B10/118 ,  H04B10/22

Abstract: A process for optically transmitting data to a remote receiver includes receiving a stream of input data signals and modulating a mid-IR laser by direct modulation with a waveform whose sequential values are responsive of the dat a signals of the stream. The direct modulation includes pumping the mid-IR las er to produce high and low optical power levels in response to different ones of t he values. The process also includes transmitting output light from the modulated mid-I R laser to the remote receiver via a free space communications channel.

公开(公告)号：DE60102343T2

公开(公告)日：2005-02-17

申请号：DE60102343

申请日：2001-05-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  CHO ALFRED YI ,  CHU SUNG-NEE GEORGE ,  GMACHL CLAIRE F ,  HUTCHINSON ALBERT LEE ,  SERGENT ARTHUR MIKE ,  SIVCO DEBORAH LEE ,  TREDICUCCI ALESSANDRO ,  WANKE MICHAEL CLEMENT

IPC: H01S5/343 ,  H01S5/34

Abstract: The RT regions of an ISB light emitter comprise pre-biased SLs and a multiplicity of split quantum wells (SPQWs). A SPQW is a quantum well that is divided into a multiplicity of sub-wells by a first barrier layer sufficiently thin that the upper and lower energy states are split beyond their natural broadening and contribute to different minibands in each RT region. In contrast, adjacent SPQWs are coupled to one another by second barrier layers. The thicknesses of the latter layers are chosen so that minibands are created across each RT region. In one embodiment, the emitter includes an I/R region between adjacent RT regions, and in another embodiment the I/R regions are omitted.

公开(公告)号：CA2348005C

公开(公告)日：2005-01-11

申请号：CA2348005

申请日：2001-05-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SIVCO DEBORAH LEE ,  SERGENT ARTHUR MIKE ,  CAPASSO FEDERICO ,  GMACHL CLAIRE F ,  HUTCHINSON ALBERT LEE ,  CHO ALFRED YI ,  TREDICUCCI ALESSANDRO ,  CHU SUNG-NEE GEORGE ,  WANKE MICHAEL CLEMENT

IPC: H01S5/343 ,  H01S5/34

Abstract: The RT regions of an ISB light emitter comprise pre-biased SLs and a multiplicity of split quantum wells (SPQWs). A SPQW is a quantum well that i s divided into a multiplicity of sub-wells by a first barrier layer sufficiently thin that the upper and lower energy states are split beyond their natural broadening and contribute to different minibands in each RT region. In contrast, adjacent SPQWs are coupled to one another by second barrier layers. The thicknesses of the latter layers are chosen so that minibands are created across each RT region. In one embodiment, the emitter includes an I/R region between adjacent RT regions, and in another embodiment the I/R regions are omitted.

公开(公告)号：DE60102343D1

公开(公告)日：2004-04-22

申请号：DE60102343

申请日：2001-05-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  CHO ALFRED YI ,  CHU SUNG-NEE GEORGE ,  GMACHL CLAIRE F ,  HUTCHINSON ALBERT LEE ,  SERGENT ARTHUR MIKE ,  SIVCO DEBORAH LEE ,  TREDICUCCI ALESSANDRO ,  WANKE MICHAEL CLEMENT

IPC: H01S5/343 ,  H01S5/34

Abstract: The RT regions of an ISB light emitter comprise pre-biased SLs and a multiplicity of split quantum wells (SPQWs). A SPQW is a quantum well that is divided into a multiplicity of sub-wells by a first barrier layer sufficiently thin that the upper and lower energy states are split beyond their natural broadening and contribute to different minibands in each RT region. In contrast, adjacent SPQWs are coupled to one another by second barrier layers. The thicknesses of the latter layers are chosen so that minibands are created across each RT region. In one embodiment, the emitter includes an I/R region between adjacent RT regions, and in another embodiment the I/R regions are omitted.

公开(公告)号：DE69903200D1

公开(公告)日：2002-11-07

申请号：DE69903200

申请日：1999-01-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  CHO ALFRED YI ,  CHU SUNG-NEE GEORGE ,  FAIST JEROME ,  HUTCHINSON ALBERT LEE ,  SIVCO DEBORAH LEE

IPC: H01S5/00 ,  H01S5/06 ,  H01S5/12 ,  H01S5/34

Abstract: A quantum cascade (QC) laser has a multilayer core region comprising alternating layers of a first and a second semiconductor material, with lattice constants a1 and a2, respectively. The first material is selected such that a1 > ao, where ao is the lattice constant of the substrate (typically InP), and the second material is selected such that a 2 ao. The materials are also selected such that the conduction band discontinuity DELTA Ec between the first and second materials is greater than 520 meV in absolute value. The multilayer core comprises a multiplicity of essentially identical multilayer repeat units. The layer thicknesses and materials of the repeat units are selected to substantially provide strain compensation over a repeat unit. QC lasers according to this invention preferably comprise a distributed feedback feature, (e.g., a Bragg grating) selected to ensure single mode laser emission, and can be designed for operation at a wavelength in the first atmospheric window, typically about 3-5 mu m. Such lasers can advantageously be used for absorption spectroscopy, e.g., for emission monitoring.

公开(公告)号：DE69900427D1

公开(公告)日：2001-12-13

申请号：DE69900427

申请日：1999-05-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BAILLARGEON JAMES NELSON ,  CAPASSO FEDERICO ,  CHO ALFRED YI ,  GMACHL CLAIRE F ,  HUTCHINSON ALBERT LEE ,  SIVCO DEBORAH LEE ,  TREDICUCCI ALESSANDRO

IPC: H01S5/00 ,  H01S5/34 ,  H01S5/343

Abstract: A novel quantum cascade (QC) laser comprises a multiplicity of identical repeat units, with each repeat unit comprising an active region and an injector region. The injector region comprises quantum wells and barriers, selected to facilitate, under appropriate bias, resonant carrier transport from a lower energy level of a given active region to an upper energy level of an adjacent downstream active region. Carrier transition from the energy level to a lower energy level of an active region results in emission of infrared radiation. The laser is advangeously used in, e.g., a measurement system for detection of trace compounds in air.

公开(公告)号：DE69800148T2

公开(公告)日：2001-01-11

申请号：DE69800148

申请日：1998-03-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  YI CHO ALFRED ,  FAIST JEROME ,  HUTCHINSON ALBERT LEE ,  SIRTORI CARLO ,  SIVCO DEBORAH LEE

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/34 ,  H01S5/343 ,  H01S5/30

Abstract: In a novel tunable semiconductor intersubband laser (111), the lasing transition (41) is a non-resonant tunneling transition, with the frequency of the emitted photon depending on the electrical bias across the multi-period active region (12) of the laser. The laser can be designed to emit in the mid-IR, and can advantageously be used for, e.g., trace gas sensing.