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Optical bistability in GaInAsP/InP coupled-circular resonator microlasers
Jian-Dong Lin1, Yong-Zhen Huang, Yue-De Yang
1State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China.
Optics Letters
|September 3, 2011
Summary
Optical bistability was achieved in GaInAsP/InP microlasers using planar technology. This phenomenon arises from mode competition between coupled circular resonators, observed via hysteresis loops in output power versus injection current.
Area of Science:
- Optoelectronics
- Semiconductor Lasers
- Nanophotonics
Background:
- Optical bistability is a crucial phenomenon for all-optical switching and signal processing.
- GaInAsP/InP material systems are widely used in optoelectronic devices.
- Coupled-resonator structures offer unique optical properties.
Purpose of the Study:
- To demonstrate optical bistability in GaInAsP/InP coupled-circular resonator microlasers.
- To investigate the underlying mechanism of the observed bistability.
- To explore the potential of these devices for optical applications.
Main Methods:
- Fabrication of GaInAsP/InP coupled-circular resonator microlasers using planar technology.
- Characterization of optical bistability by measuring output power versus continuous-wave (CW) injection current at room temperature.
- Analysis of laser output spectra to understand the bistability mechanism.
Main Results:
- Optical bistability was successfully realized in the fabricated microlasers.
- Hysteresis loops were observed in the output power versus CW injection current characteristics.
- Analysis of spectra indicated that bistability is linked to mode competition.
Conclusions:
- The observed optical bistability in GaInAsP/InP coupled-circular resonator microlasers is attributed to mode competition.
- Symmetry and antisymmetry coupled modes relative to the bus waveguide are responsible for the bistability.
- These findings contribute to the development of advanced optical devices.
