Abstract:
A laser device for generating an optical wave including at least two frequencies, such laser device including: a first element including a gain region, a second mirror, distinct from the first element, and arranged so as to form with a first mirror an optical cavity including the gain region; means for pumping the gain region so as to generate the optical wave; means for shaping the light intensity of the optical wave arranged for selecting at least two transverse modes of the optical wave; and means for shaping the longitudinal and/or transversal phase profile of the optical wave and arranged for adjusting at least two transverse modes of the optical wave.
Abstract:
A broad area semiconductor diode laser device includes a multimode high reflector facet, a partial reflector facet spaced from said multimode high reflector facet, and a flared current injection region extending and widening between the multimode high reflector facet and the partial reflector facet, wherein the ratio of a partial reflector facet width to a high reflector facet width is n:1, where n>1. The broad area semiconductor laser device is a flared laser oscillator waveguide delivering improved beam brightness and beam parameter product over conventional straight waveguide configurations.
Abstract:
System for wavelength stabilization in a multimode (MM) laser diode (LD), including at least one MM LD, a respective at least one MM 2×2 beam splitter for each MM LD, an isolator and at least one LD, the LD being respectively coupled with the isolator, the MM LD for generating high power MM laser light, the isolator for enabling laser light to pass through in only one direction and the LD for generating low power laser light, each respective MM 2×2 beam splitter including four ports, each respective MM 2×2 beam splitter having a highly asymmetric splitting ratio and for splitting the generated high power MM laser light and the generated low power laser light, each MM LD being respectively coupled with the fourth port of each respective MM 2×2 beam splitter and a wavelength of the high power laser light locking onto a wavelength of the low power laser light.
Abstract:
The present invention provides a surface emitting laser that provides a sufficient optical output and is suitable as a light source intended for electrophotographic apparatuses, and a surface-emitting-laser array and an image forming apparatus each including the surface emitting laser. The surface emitting laser includes a first stepped structure on a front surface of a front mirror. In the first stepped structure, a difference L between an optical path length in a first area and an optical path length in a second area satisfies the following expression: (¼+N)λ
Abstract translation:本发明提供一种表面发射激光器,其提供足够的光输出并且适合作为用于电子照相设备的光源,以及包括表面发射激光器的表面发射激光器阵列和图像形成装置。 表面发射激光器包括在前反射镜的前表面上的第一阶梯结构。 在第一阶梯结构中,第一区域的光路长度与第二区域的光程长度之间的差值L满足以下表达式:(¼+ N)λ<| L | <(¾+ N)λ其中 N是整数。
Abstract:
A widely tunable multi-mode semiconductor laser containing only two electrically active sections, being an optical gain section and a tunable distributed Bragg reflector section adapted to reflect at a plurality of wavelengths, wherein the gain section is bounded by the tunable distributed Bragg reflector section and a broadband facet reflector, and wherein the tunable distributed Bragg reflector section comprises a plurality of discrete segments capable of being selectively tuned, wherein the reflection spectra of one or more segments of the tunable distributed Bragg reflector section can be tuned lower in wavelength to reflect with the reflection spectrum of a further segment of the tunable distributed Bragg reflector section to provide a wavelength range of enhanced reflectivity. An optical transmitter comprising a light source that is such a widely tunable multi-mode semiconductor laser.
Abstract:
A method for producing an optoelectronic semiconductor component includes: epitaxially growing a semiconductor layer sequence including an active layer on a growth substrate, shaping a front facet at the semiconductor layer sequence and the growth substrate, coating a part of the front facet with a light blocking layer for radiation generated in the finished semiconductor component, wherein the light blocking layer is produced by a directional coating method and the light blocking layer is structured during coating by shading by the growth substrate and/or by at least one dummy bar arranged at and/or alongside the growth substrate.
Abstract:
A broad area semiconductor diode laser device includes a multimode high reflector facet, a partial reflector facet spaced from said multimode high reflector facet, and a flared current injection region extending and widening between the multimode high reflector facet and the partial reflector facet, wherein the ratio of a partial reflector facet width to a high reflector facet width is n:1, where n>1. The broad area semiconductor laser device is a flared laser oscillator waveguide delivering improved beam brightness and beam parameter product over conventional straight waveguide configurations.
Abstract:
The present invention is aimed to prevent occurrence of COD and rapid degradation of light output in semiconductor laser devices. The semiconductor laser device includes a semiconductor laser element 100A and a support member 200. The semiconductor laser element 100a includes a first electrode 13, a substrate 11, and a semiconductor structure 12 having an emitting facet and a reflecting facet, a second electrode 15, and a pad 16, in this order. The semiconductor laser element 100A is connected to a support member 200 at its pad 16 side via a connecting member 300. The emitting-side end portion of the second electrode 15 is spaced apart from the emitting facet of the semiconductor structure 12, and the emitting-side end portion of the pad 16 is located at an outer side than the emitting-side end portion the second electrode 15.
Abstract:
A semiconductor optical device includes a first mode converting core, a light amplification core, a second mode converting core, and a light modulation core disposed in a first mode converting region, a light amplification region, a second mode converting region, and a light modulating region of a semiconductor substrate, respectively, and a current blocking section covering at least sidewalls and a top surface of the light amplification core. The first mode converting core, the light amplification core, the second mode converting core, and the light modulation core are arranged along one direction in the order named, and are connected to each other in butt joints. The current blocking section includes first, second, and third cladding patterns sequentially stacked. The second cladding pattern is doped with dopants of a first conductivity type, and the first and third cladding patterns are doped with dopants of a second conductivity type.
Abstract:
Disclosed is a light generating device which comprises a first reflective semiconductor optical amplifier emitting a first light along a first direction, a second reflective semiconductor optical amplifier emitting the second light in a direction opposite to the first direction, an optical distributer reflecting a part of an incident light and to pass the remaining of the incident light, and an optical comb filter passing a wavelength component of a specific period.