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Direct-modulated waveguide-coupled microspiral disk lasers with spatially selective injection for on-chip optical
Optics Express
|February 12, 2014
Summary
We developed compact, unidirectional on-chip lasers using microspiral disk resonators for optical interconnects. These lasers achieve high-speed modulation and significant output power, paving the way for advanced integrated photonics.
Area of Science:
- Integrated photonics
- Semiconductor lasers
- Optical communications
Background:
- On-chip optical interconnects are crucial for high-performance computing.
- Compact and efficient laser sources are needed for integrated photonic circuits.
- Microspiral resonators offer unique properties for laser design.
Purpose of the Study:
- To investigate direct-modulated waveguide-coupled microspiral disk lasers.
- To develop compact, unidirectional on-chip laser sources.
- To enhance laser performance through spatially selective current injection.
Main Methods:
- Fabrication of waveguide-coupled microspiral disk lasers using AlGaInAs/InP material system.
- Implementation of a ring-shaped p-contact for selective current injection.
- Characterization of laser performance, including output power, modulation bandwidth, and data transmission.
Main Results:
- Demonstrated room-temperature continuous-wave operation of electrically injected lasers.
- Achieved laser output power of at least 200 μW for a 30 μm microspiral disk laser.
- Realized small-signal modulation with a 3dB bandwidth exceeding 10 GHz.
- Showcased an open eye diagram at 15 Gbit/s.
Conclusions:
- Microspiral disk lasers are promising for on-chip optical interconnects.
- Spatially selective injection effectively enhances laser performance.
- The developed lasers meet key requirements for high-speed optical communication.
