公开(公告)号：AU497635B2

公开(公告)日：1978-12-21

申请号：AU8381575

申请日：1975-08-08

Applicant: XEROX CORP

Inventor： SCIFRES DONALD R ,  STREIFER WILLIAM ,  BURNHAM ROBERT D

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/12 ,  H01S5/187 ,  H01S3/07 ,  H01L21/20 ,  H01L21/22 ,  H01L21/263 ,  H01L21/302 ,  H01L27/15 ,  H01L29/06 ,  H01L33/00 ,  H01S3/096 ,  H01S3/19

公开(公告)号：CA1042095A

公开(公告)日：1978-11-07

申请号：CA235470

申请日：1975-09-15

Applicant: XEROX CORP

Inventor： STREIFER WILLIAM ,  SCIFRES DONALD R ,  BURNHAM ROBERT D

IPC: H01S5/00 ,  H01S5/12 ,  H01S3/19

Abstract: ELECTRICALLY PUMPED, SOLID-STATE DISTRIBUTED FEEDBACK LASER WITH PARTICULAR GRATING SPACING A distributed feed back (DFB), electrically pumped diode laser in which the spacing of the periodic structure within the diode is selected to optimize the interaction between the periodic structure and the electromagnetic waves in the diode laser. The degree to which the waves interact with the periodic structure is described mathematically by a coupling constant K, with larger values of K corresponding to lower gains required to produce laser operation. It is shown that in DFB diode lasers higher order transverse modes have a higher coupling constant K with the periodic structure than does the lowest order transverse mode and thus the higher order transverse modes will lase more easily than the lowest order transverse mode.

公开(公告)号：CA2038334A1

公开(公告)日：1991-09-29

申请号：CA2038334

申请日：1991-03-15

Applicant: XEROX CORP

Inventor： PAOLI THOMAS L ,  CONNELL G A NEVILLE ,  SCIFRES DONALD R ,  THORNTON ROBERT L

IPC: H01S5/00 ,  H01L27/15 ,  H01S5/026 ,  H01S5/042 ,  H01S5/06 ,  H01S5/0683 ,  H01S5/40 ,  H01L31/14

公开(公告)号：FR2493616B1

公开(公告)日：1987-02-06

申请号：FR8120291

申请日：1981-10-29

Applicant: XEROX CORP

Inventor： SCIFRES DONALD R ,  STREIFER WILLIAM ,  BURNHAM ROBERT D

IPC: H01S5/16 ,  H01S5/00 ,  H01S5/227 ,  H01S3/14

Abstract: Heterostructure injection lasers include a combination optically coupled active and passive waveguide means forming an optically confining channel or strip between end facets. A passive or transparent waveguide means in the vicinity of the laser facets optically confines the radiation thereto in both dimensions transverse to the direction of propagation. The passive means is coupled to an active region of the laser which also optically confines the propagating radiation to the active region in both dimensions transverse to the direction of propagation. The active strip does not extend to the end facets of the laser. The combination active and passive means provides for high power, low divergence output beam, fundamental transverse mode control, lower operational current thresholds and the substantial elimination of laser astigmatism found in strip buried heterostructure lasers.

公开(公告)号：DE3273383D1

公开(公告)日：1986-10-23

申请号：DE3273383

申请日：1982-12-03

Applicant: XEROX CORP

Inventor： BURNHAM ROBERT D ,  SCIFRES DONALD R ,  STREIFER WILLIAM

IPC: H01S5/00 ,  H01S5/026 ,  H01S5/10 ,  H01S5/16 ,  H01S5/20 ,  H01S5/30 ,  H01S5/32 ,  H01S5/34 ,  H01S3/19 ,  H01S3/06

公开(公告)号：CA1202132A

公开(公告)日：1986-03-18

申请号：CA386759

申请日：1981-09-28

Applicant: XEROX CORP

Inventor： SCIFRES DONALD R ,  SPRAGUE ROBERT A

IPC: G02F1/03 ,  G02F1/05 ,  G02F1/29 ,  G09G3/02

Abstract: An electrooptical scanning device for deflection of an optical beam of light across an image plane. The device comprises a body of electrooptical crystal material and a periodic array of parallel, spaced electrodes associated with one surface of the body. A light beam entering the crystal body is caused to interact with electric fields established at the one surface by step applied voltages to the electrode array that influence the deflection of the light beam at the moment of total internal reflection at the one surface. By varying the magnitude of the applied voltages across the electrodes, a corresponding approximation of a desired phase retardation can be produced along the phase front of the light beam. The phase retardation across the light beam can be designed to produce a linear phase front angled beam or can be designed to produce a curvalinear phase front forming a focused spot at the image plane. With the changing of the magnitude of the applied voltages across the electrode array, the beam or spot may be made to move about or scan across the image plane.

公开(公告)号：CA1158754A

公开(公告)日：1983-12-13

申请号：CA359253

申请日：1980-08-29

Applicant: XEROX CORP

Inventor： BURNHAM ROBERT D ,  SCIFRES DONALD R ,  STREIFER WILLIAM

IPC: H01L21/208 ,  H01S5/00 ,  H01S5/223 ,  H01S5/227 ,  H01S3/19

Abstract: A heterostructure semiconductor laser (40) is characterized by having a channeled mesa (44) contiguous with the top surface (55) of the laser substrate (52). The channeled mesa (44) comprises an elongated mesa with an elongated channel (50) formed in the top surface (47, 49) of the mesa structure. The epitaxial growth of semiconductor layers over the channeled mesa produces layers having uniform thickness with smooth facet like texture and without layer surface irregularities. The channeled mesa may also be employed in the fabrication of nonplanar large optical cavity lasers.

公开(公告)号：CA1083254A

公开(公告)日：1980-08-05

申请号：CA303234

申请日：1978-05-12

Applicant: XEROX CORP

Inventor： BURNHAM ROBERT D ,  SCIFRES DONALD R

IPC: H01S5/00 ,  H01L29/06 ,  H01S5/223 ,  H01S3/19

Abstract: METHOD OF MAKING ETCHED-STRIPED SUBSTRATE PLANAR LASER A method of making a diode laser in which a pump current confining channel is formed on the substrate side of a diode laser prior to growth of the active or recombination region of the diode laser. The current confining channel is formed by providing, by diffusion, a rectifying junction on a substrate surface and then forming, by etching, a narrow channel completely through a central portion of the diffused layer and the rectifying junction. The remaining layers of the diode laser are then successively grown. The portions of the rectifying junction on both sides of the channel are reverse biased when the primary junction of the diode laser is forward biased whereby pump current flow is confined to a path through the channel.

公开(公告)号：CA1068807A

公开(公告)日：1979-12-25

申请号：CA265109

申请日：1976-11-08

Applicant: XEROX CORP

Inventor： BURNHAM ROBERT D ,  SCIFRES DONALD R ,  STREIFER WILLIAM

IPC: H01S5/00 ,  H01S5/12 ,  H01S5/187 ,  H01S5/40 ,  H01S3/19

Abstract: CORRUGATION COUPLED TWIN GUIDE LASER An electrically pumped distributed feedback grating coupled diode laser having an optical cavity containing two closely spaced layers, a first of the layers is electrically pumped and the second of the layers is corrugated. optical wavelength radiation and amplification of said radiation is generated in the first layer by carrier recombination with the radiation spreading to the second layer for coherent reflection by the corrugation and for low loss transmission. Carrier confinement in the first layer and optical confinement in the optical cavity are achieved by surrounding each of these layers by materials having a higher bandgap and lower index of refraction than the materials of the first and the second layers. The corrugation of the second layer can extend over only a portion of the length of the second layer such that the uncorrugated portion of the second layer provides a low loss waveguide.

公开(公告)号：DE2653382A1

公开(公告)日：1977-06-23

申请号：DE2653382

申请日：1976-11-24

Applicant: XEROX CORP

Inventor： BURNHAM ROBERT D ,  SCIFRES DONALD R ,  STREIFER WILLIAM

IPC: H01S5/00 ,  H01S5/12 ,  H01S5/187 ,  H01S5/40 ,  H01S3/19

Abstract: CORRUGATION COUPLED TWIN GUIDE LASER An electrically pumped distributed feedback grating coupled diode laser having an optical cavity containing two closely spaced layers, a first of the layers is electrically pumped and the second of the layers is corrugated. optical wavelength radiation and amplification of said radiation is generated in the first layer by carrier recombination with the radiation spreading to the second layer for coherent reflection by the corrugation and for low loss transmission. Carrier confinement in the first layer and optical confinement in the optical cavity are achieved by surrounding each of these layers by materials having a higher bandgap and lower index of refraction than the materials of the first and the second layers. The corrugation of the second layer can extend over only a portion of the length of the second layer such that the uncorrugated portion of the second layer provides a low loss waveguide.