High-power single-mode vertical-cavity surface-emitting lasers with triangular holey structure

Abstract

By the two-dimensional triangular holey structure, a high-power stable single-mode operation was demonstrated in oxide confined $850\mathrm{nm}$ vertical-cavity surface-emitting lasers. For two types of hole alignments, the lasing operation was observed with different near field patterns, i.e., a single spot pattern and a floral pattern. The former showed an output power of $2\mathrm{mW}$ with a high side-mode suppression ratio (SMSR) of $45–50\mathrm{dB}$ , which is explained by the selective loss mechanism. The latter showed a high power of $7\mathrm{mW}$ with a SMSR of $40\mathrm{dB}$ . The observed lasing spectrum and far field pattern indicate that it is a deformed fundamental mode whose bright spots extending over the device are in-phase oscillating. This device structure will be effective for the enhancement of single-mode power in devices with any material system.