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：DE69923890T2

公开(公告)日：2005-12-29

申请号：DE69923890

申请日：1999-07-20

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/10 ,  H01S5/323 ,  H01S5/34 ,  H01S5/343 ,  H01S5/30

Abstract: A long wavelength (e.g., mid-IR to far-IR) semiconductor laser comprises an active region and at least one cladding region characterized in that the cladding region includes a light guiding interface between two materials which have dielectric constants opposite in sign. Consequently, the guided modes are transverse magnetic polarized surface waves (i.e., surface plasmons) which propagate along the interface without the need for a traditional dielectric cladding. In a preferred embodiment, the interface is formed between a semiconductor layer and a metal layer. The complex refractive index of the metal layer preferably has an imaginary component which is much larger than its real component. In an illustrative embodiment, our laser includes a Quantum cascade active region sandwiched between a pair of cladding regions one of which is a guiding interface based on surface plasmons and the other of which is a dielectric (e.g., semiconductor) structure.

公开(公告)号：CA2364797A1

公开(公告)日：2002-07-22

申请号：CA2364797

申请日：2001-12-11

Applicant: STEVENS INST TECHNOLOGY ,  LUCENT TECHNOLOGIES INC

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

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

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：CA2331194A1

公开(公告)日：2001-08-24

申请号：CA2331194

申请日：2001-01-17

Applicant: LUCENT TECHNOLOGIES INC

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

IPC: G01N21/01 ,  G01N21/35 ,  G02B5/18 ,  H01S5/10 ,  H01S5/12 ,  H01S5/187 ,  H01S5/34 ,  H01S5/343 ,  H01S5/125

Abstract: A surface plasmon laser structure is formed to include a DFB structure as t he metal carrying layer, thus forming a single mode surface plasmon laser. The DFB structure comprises a multiple layer metallic surface guiding structure (for example, titanium stripes covered with a layer of gold, forming alternating Ti/Au - A u stripes). The active region, in one embodiment, may comprise a quantum cascade structure.

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：DE69927201D1

公开(公告)日：2005-10-20

申请号：DE69927201

申请日：1999-04-13

Applicant: LUCENT TECHNOLOGIES INC ,  MAX PLANCK GESELLSCHAFT ,  UNIV YALE NEW HAVEN

Inventor： CAPASSO FEDERICO ,  YI CHO ALFRED ,  FAIST JEROME ,  GMACHL CLAIRE F ,  NARIMANOV EVGUENI E ,  NOECKEL JENS U ,  SIVCO DEBORAH LEE ,  STONE ALFRED DOUGLAS

IPC: H01S5/00 ,  H01S3/08 ,  H01S3/083 ,  H01S5/065 ,  H01S5/10 ,  H01S5/323 ,  H01S5/343 ,  H01S3/06 ,  H01S5/30

Abstract: A solid state laser comprises a cavity resonator in the form of a generally cylindrical body and, located within the resonator, an active region which generates lasing light when suitably pumped. The resonator has a relatively high effective refractive index (n > 2 and typically n > 3) is sufficiently deformed from circularity so as to support at least one librational mode (e.g., a V-shaped or a bow-tie mode, the latter being presently preferred for generating relatively high power, directional outputs). Specifically described is a Group III-V compound semiconductor, quantum cascade (QC), micro-cylinder laser in which the resonator has a flattened quadrupolar deformation from circularity. This laser exhibits both a highly directional output emission and a three-order of magnitude increase in optical output power compared to conventional semiconductor micro-cylinder QC lasers having circularly symmetric resonators.

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.