公开(公告)号：DE69116409T2

公开(公告)日：1996-07-04

申请号：DE69116409

申请日：1991-03-28

Applicant: XEROX CORP

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

IPC: H01S5/00 ,  H01L27/15 ,  H01S5/026 ,  H01S5/042 ,  H01S5/06 ,  H01S5/0683 ,  H01S5/40 ,  H01S3/025 ,  H01S3/133 ,  H01S3/25

公开(公告)号：DE69116409D1

公开(公告)日：1996-02-29

申请号：DE69116409

申请日：1991-03-28

Applicant: XEROX CORP

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

IPC: H01S5/00 ,  H01L27/15 ,  H01S5/026 ,  H01S5/042 ,  H01S5/06 ,  H01S5/0683 ,  H01S5/40 ,  H01S3/025 ,  H01S3/133 ,  H01S3/25

公开(公告)号：CA1325670C

公开(公告)日：1993-12-28

申请号：CA445219

申请日：1984-01-13

Applicant: XEROX CORP

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

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/10 ,  H01S5/16 ,  H01S5/223 ,  H01S5/343 ,  H01S5/40 ,  H01S3/19 ,  H01S3/07 ,  H01S3/08

Abstract: A semiconductor laser is provided with one or more layers forming an active region for supporting radiation propogating under lasing conditions in an optical cavity established between transverse end facets of the laser. The active region is characterized by having a combination index and gain guiding region. The regions between the central region and the end facets may be provided with sufficiently thin active region thickness to form a synthetic transparent or quantum well waveguide so as not to be radiation absorbing due to the quantization of electron states.

公开(公告)号：DE3174505D1

公开(公告)日：1986-06-05

申请号：DE3174505

申请日：1981-08-21

Applicant: XEROX CORP

Inventor： FEKETE DAN H ,  SCIFRES DONALD R ,  STREIFER WILLIAM

IPC: H01S5/00 ,  H01S5/026 ,  H01S5/042 ,  H01S5/06 ,  H01S5/062 ,  H01S5/10 ,  H01S5/40 ,  H01S3/23 ,  H01S3/10

公开(公告)号：CA1203611A

公开(公告)日：1986-04-22

申请号：CA303315

申请日：1978-05-15

Applicant: XEROX CORP

Inventor： BURNHAM ROBERT D ,  SCIFRES DONALD R

IPC: H01S3/18

Abstract: LASER WITH MODE CONTROL AND PUMP CURRENT CONFINEMENT A diode laser in which improved transverse mode control is achieved by bounding at least one side of the laser active region (in which the lowest order transverse mode exists) by a thicker, lower index of refraction region of higher bandgap. The thicker, higher bandgap region, as well as a pump current confinement path, can be provided by a relatively deep substrate surface channel which extends completely through a portion of a rectifying junction formed near the substrate surface.

公开(公告)号：DE3067156D1

公开(公告)日：1984-04-26

申请号：DE3067156

申请日：1980-09-04

Applicant: XEROX CORP

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

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

公开(公告)号：CA1137605A

公开(公告)日：1982-12-14

申请号：CA339688

申请日：1979-11-13

Applicant: XEROX CORP

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

IPC: H01L21/208 ,  H01L21/20 ,  H01S5/00 ,  H01S5/20 ,  H01S5/223 ,  H01S3/18

Abstract: A heterostructure injection laser is provided with very thin cladding or confinement layers adjacent each side of the active layer. The cladding layers are characterized with the wider bandgap while the active layer has the smallest bandgap and the highest index of refraction. The injected carriers are confined by the thin wide bandgap cladding layers on either side of the active layer while the optical wave is confined by thick intermediate index layers of the laser. This structure provides for overall low thermal resistance thereby allowing for higher output power with low beam divergence.

公开(公告)号：CA1049640A

公开(公告)日：1979-02-27

申请号：CA237368

申请日：1975-10-09

Applicant: XEROX CORP

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

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/187 ,  H01S3/19 ,  H01S3/08

Abstract: INTEGRATED GRATING OUTPUT COUPLER IN DIODE LASERS A heterojunction diode laser which produces a highly collimated, polarized light beam perpendicular to the plane of the PN junction of the laser rather than through cleaved end faces in the plane of the PN junction. The diode laser includes a periodic structure which is buried at a heterojunction interface and in contact with a light waveguide layer. The periodic structure acts to produce the feedback necessary for lasing. If the spacing of the teeth of the periodic structure are an integer number of wavelengths of the light photons produced in the laser, the light beam exits at an angle perpendicular to the plane of the PN junction. If a tooth spacing is chosen that is not equal to an integer number of wavelengths of the light photons produced in the laser, the light beam may emerge from the diode at an angle other than the normal with the specific angle determined by the particular tooth spacing. To increase output intensity, the ends of the laser perpendicular to the plane of the PN junction and parallel to the teeth of the periodic structure may be cleaved and coated with a highly light reflective film.

公开(公告)号：DE2711293A1

公开(公告)日：1977-10-27

申请号：DE2711293

申请日：1977-03-15

Applicant: XEROX CORP

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

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/10 ,  H01S5/323 ,  H01S3/19 ,  H01S3/096

公开(公告)号：DE2556850A1

公开(公告)日：1976-10-07

申请号：DE2556850

申请日：1975-12-17

Applicant: XEROX CORP

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

IPC: H01L33/00 ,  H01S5/00 ,  H01S5/10 ,  H01S5/12 ,  H01S5/187 ,  H01S5/40 ,  H01S5/42 ,  H01S3/05 ,  H01S3/19

Abstract: An electrically pumped, distributed feedback laser having all side surfaces of the active laser medium cleaved and a periodic structure at a 45 DEG angle to all of the cleaved surfaces. Current confining channels restrict pumping current to selected regions of the active laser medium to provide sufficient feedback such that two parallel filamentary areas of the active medium lase. By having multiple lasing filaments the divergence of the output beam in the direction of the width of the filaments is reduced by a factor proportional to the number of filamentary lasing areas.