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Resonant characteristics of multimode interferometer coupled square ring semiconductor resonators
Kyung-Sook Hyun1, Hee-Jong Moon
1Department of Optical Engineering, Sejong University, 98 Kunja-Dong, Kwangjin-Ku, Seoul, 143-747, Korea. kshyun@sejong.ac.kr
Optics Express
|April 15, 2010
Summary
Researchers developed coupled square ring semiconductor resonators for stable single-mode lasing. By integrating multimode interferometers (MMIs), they precisely controlled spectral characteristics for advanced photonic applications.
Area of Science:
- Optoelectronics and Photonics
- Semiconductor Device Physics
- Quantum Well Engineering
Background:
- Semiconductor ring resonators are crucial for integrated optics.
- Achieving stable single-mode operation in such devices is challenging.
- Multimode interferometers (MMIs) offer potential for mode control.
Purpose of the Study:
- To investigate the spectral characteristics of coupled square ring semiconductor resonators.
- To demonstrate single-mode operation using MMI-coupled square ring cavities.
- To explore the tunability of resonant properties through design parameters.
Main Methods:
- Fabrication of square ring cavities using InGaAsP-InP multiple quantum wells at 1.55 micrometer wavelength.
- Integration of multimode interferometers (MMIs) with the square ring cavities.
- Experimental characterization of spectral properties and lasing modes.
- Systematic variation of cavity size and waveguide width parameters.
Main Results:
- Stable single spectral lasing mode achieved in MMI-coupled square ring cavities.
- Resonant characteristics were successfully tailored by adjusting cavity size and waveguide width.
- Demonstrated the effectiveness of MMIs in achieving single-mode operation.
- Reported spectral characteristics of the fabricated coupled resonators.
Conclusions:
- MMI-coupled square ring semiconductor resonators are effective for stable single-mode lasing.
- The design allows for precise tailoring of spectral characteristics.
- This work contributes to the development of advanced photonic devices.
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