Coherence of a single mode InAlGaAs/InP cylinderical microlaser with two output ports

Area of Science:

• Optoelectronics
• Semiconductor Lasers
• Nanophotonics

Background:

• Microlasers are crucial components in integrated optics.
• Developing stable, single-mode microlasers is essential for advanced photonic applications.
• Cylindrical microlasers offer unique optical properties.

Purpose of the Study:

• To experimentally investigate the coherence of a single-mode InAlGaAs/InP cylindrical microlaser with two output waveguides.
• To evaluate the performance of such microlasers for optical sensing.
• To explore the potential of dual-output waveguide microlasers in interferometric applications.

Main Methods:

• Fabrication of InAlGaAs/InP cylindrical microlasers with specific dimensions (15 μm radius, 2 μm waveguide width).
• Experimental characterization of single-mode operation and side mode suppression ratio (SMR).
• Observation of far-field interferometric patterns using optical measurement techniques.

Main Results:

• Achieved single-mode operation with a high side mode suppression ratio (30 dB).
• Observed a far-field interferometric pattern analogous to a Young's interferometer.
• Demonstrated the microlaser's capability for phase-sensitive measurements.

Conclusions:

• The developed InAlGaAs/InP cylindrical microlaser with two output waveguides exhibits excellent single-mode performance.
• The observed interferometric pattern highlights its potential for coherent light manipulation.
• These microlasers are promising light sources for developing novel optical sensors based on phase monitoring.