High power 650nm semiconductor laser for digital multi-purpose optical disks and manufacturing method

Abstract

The invention relates to a digital multi-function disc used large power 650nm semiconductor laser, which comprises a substrate used to do laser material structure external growth, a buffer layer on the substrate, a N type cladding on the buffer layer to limit the leakage of the loading unit, an active region layer on the cladding, a first P type cladding on the active region layer to limit the leakage of the loading unit, a current barrier layer on the P type cladding to barriers the current spread to reduce the current leakage, a second P type cladding on the current barrier layer and the first P type cladding to limit the leakage of the loading unit, a basaltic layer on the second P type cladding, an electrode touching layer on the basaltic layer, a double groove structure on the electrode touching layer, the basaltic layer and the second P type cladding which adopts etching bath to etch the three grooves, and a silicon nitride oxide layer on the electrode touching layer which covers the double grooves.

Description

technical field [0001] The invention relates to the structural design of a high-power 650nm semiconductor laser and the corresponding device manufacturing procedure. To be precise, according to the actual application of 650nm semiconductor laser, in order to realize its high-power (0-70mW) output work under the condition of fundamental transverse mode and low power consumption, we propose a high-power 650nm laser for digital multi-function disc. A semiconductor laser: [0002] 1. Semiconductor laser device structure - double-epitaxy double-channel inner strip waveguide structure and corresponding manufacturing method; [0003] 2. The method to solve the photocatastrophic damage - constant source Zn impurity diffusion induces quantum well hybridization to make non-absorbing window. Background technique [0004] High-power 650nm semiconductor lasers for rewritable Digital Versatile Disk-Random AccessMemory (DVD-RAM) are the product of the rapid development of optical informa...

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Problems solved by technology

[0013] 1. Large optical cavity structure and tapered cavity structure, but these structures are difficult to meet the requirements of fundamental mode output;

[0014] 2. The window structure with injection area, but it is difficult to manufacture, the cost is high, and it is easy to damage the laser structure;

[0015] 3. Chemical passivation, but the drugs required for passivation are very toxic and not very practical;

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