摘要:
A method for producing a semiconductor laser including successively growing at least two semiconductor layers simultaneously on a substrate, the finally grown layer not containing aluminum and the layer grown immediately before the finally grown layer containing aluminum, etching a stripe groove through the finally grown layer to expose part of the semiconductor layer containing aluminum, growing a second semiconductor layer not including aluminum on the finally grown layer and the exposed surface of the semiconductor layer containing aluminum, and growing a semiconductor layer including aluminum on the second semiconductor layer not containing aluminum.
摘要:
A semiconductor laser device for a laser printer in which a reflection film having reflectance in a range of 45 to 65% is provided on a laser output facet for outputting a laser output beam.
摘要:
A semiconductor laser device includes semiconductor layers including a semiconductor layer having a stripe groove having a reverse trapezoidal cross section and a bent active layer spaced from and in the configuration of the groove wherein the bottom width of the groove is less than 2 microns and the distance from the active layer to the bottom of the groove is more than 0.6 micron.
摘要:
A semiconductor laser array includes a pair of regions of an active layer for emitting laser lights being provided so as to produce a predetermined angle therebetween; the respective regions of the active layer being provided so as to have TE wave electric field vectors of different directions from each other in a plane vertical to the emitting direction of the output laser light. As such, laser light emitted from each of the active layer regions can be used independently without interference from the other.
摘要:
A semiconductor laser element includes a first cladding layer of first conductivity type provided on a semiconductor substrate of the first conductivity type; a current blocking layer of a second conductivity type provided on the first cladding layer having a stripe groove from which the first cladding layer and is exposed at the bottom thereof; a light guide layer of the first conductivity type provided covering the current blocking layer, the stripe groove, and the first cladding layer exposed from the groove; an active layer provided on the light guide layer curved in the neighborhood of the stripe groove, whose refractive index is larger than that of the light guide layer; and a second cladding layer of the second conductivity type provided on the active layer, whose refractive index is smaller than that of the active layer.
摘要:
A semiconductor laser device on a GaAs substrate and having an oscillation wavelength of 1.3 &mgr;m or 1.55 &mgr;m and a method of producing the laser device. The laser device has a BTlGaAs active layer that lattice matches with the GaAs substrate. To grow the BTlGaAs active layer, organometallic vapor phase deposition is employed with cyclopentadienyl thallium as the source of Tl.
摘要:
A semiconductor laser element includes a first cladding layer of first conductivity type provided on a semiconductor substrate of the first conductivity type; a current blocking layer of a second conductivity type provided on the first cladding layer having a stripe groove from which the first cladding layer and is exposed at the bottom thereof; a light guide layer of the first conductivity type provided covering the current blocking layer, the stripe groove, and the first cladding layer exposed from the groove; an active layer provided on the light guide layer curved in the neighborhood of the stripe groove, whose refractive index is larger than that of the light guide layer; and a second cladding layer of the second conductivity type provided on the active layer, whose refractive index is smaller than that of the active layer.
摘要:
A semiconductor laser device comprises a semiconductor laser portion (17) including a double hetero structure and a vertical MIS-FET portion (18) form on, and in series with, the semiconductor laser portion (17). The vertical MIS-FET portion (18) includes an n-type GaAs layer (6), a p-type GaAs layer (7), an n-type GaAs layer (8), and a striped groove (31) having V-shaped cross-section formed from the top surface of the n-type GaAs layer (8) to the n-type GaAs layer (6). A metal gate electrode (11) is further provided on the top surface of the striped groove (31), on an insulating film (10). A current (41)flowing through the vertical MIS-FET portion (18) is changed according to a photo modulating signal applied to the metal gate electrode (11) and, a current (40) is also changed according to the current (41). Accordingly, a laser oscillation output of the semiconductor laser portion (17) is also changed to accomplish the optical output modulation of the semiconductor laser.
摘要:
Obtain an expanded address without altering the bit number of an address which is embedded in a wobble. Generate a virtual bit which is not recorded on a disc, and which is expressed by the disparity from the rules and the presence or absence of information embedded in part or all of the wobble address.
摘要:
Obtain an expanded address without altering the bit number of an address which is embedded in a wobble. Generate a virtual bit which is not recorded on a disc, and which is expressed by the disparity from the rules and the presence or absence of information embedded in part or all of the wobble address.