SEMICONDUCTOR LASER DEVICE HAVING A DIFFRACTION GRATING ON ALIGHT EMISSION SIDE
申请公布号:CA2374602(A1)
申请号:CA20022374602
申请日期:2002.03.04
申请公布日期:2002.11.01
发明人:TSUKIJI, NAOKI;FUNABASHI, MASAKI;YOSHIDA, JUNJI
分类号:H01S3/094;H01S3/0941;H01S5/10;H01S5/12;H01S5/125;H01S5/14;(IPC1-7):H01S5/10;H01S5/065
主分类号:H01S3/094
摘要:A semiconductor device and method for providing a light source suitable for use as a pumping light source in a Raman amplification system are provided. The devic e upon which the method is based includes an active layer configured to radiate light; a light reflecting facet positioned on a first side of the active layer; a light emitting facet positioned on a second side of the active layer thereby forming a resonant cavity between the light reflecting facet and the light emitting facet; and a partial diffraction grating having a predetermin ed length and positioned on a light emission side of the resonator. The predetermined leng th of the partial diffraction grating is selected such that the semiconductor device emits a light beam having a plurality of longitudinal modes within a predetermined spectral width of an oscillation wavelength spectrum of the semiconductor device. The predetermined length of the partial diffraction grating may be set in relation to a length of the resonant cavit y, or in relation to a coupling coefficient .kappa.i of the partial diffraction grating.
ELEKTRISCHE DROSSEL ZUM BETRIEB VON LEUCHTSTOFFLAMPEN.
MEHRPOLIGER ELEKTRISCHER TRENNSCHALTER.
AUFLAGEEISEN FUER BETONSCHWELLEN.
ROENTGENFILM-BETRACHTUNGSKASTEN MIT REGULIERBAREN LEUCHTSTOFFROEHREN.
FUSSVERLAENGERUNG FUER LEUCHTSTOFFLAMPENDROSSELN.
ABSCHLUSSKAPPE FUER DIE ARMLEHNEN AN FAHRERSITZEN.
BLECHHOHLTUER FUER KUECHENMOEBELEINSATZSCHRAENKE U. DGL.
RUECKENWINDSCHUTZVORRICHTUNG FUER KRAFTWAGEN.