Abstract
Optical feedback in a vertical-cavity surface-emitting laser due to a fiber facet of varying position is studied in experiment and theory. Measured spectra and light-current curves show periodic variations in resonant wavelength, threshold current, differential quantum efficiency, and output power as a function of fiber position. Theoretical results were obtained using a 2 × 2 vector propagation matrix method which models the laser and fiber in a single structure and shows good agreement with experimental results. A novel method for determining the linewidth enhancement factor α by analyzing the wavelength variation as a function of fiber position is presented and a value of α = 2.8 was obtained.
Original language | English (US) |
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Pages (from-to) | 1643-1649 |
Number of pages | 7 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 37 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2001 |
Keywords
- Linewidth enhancement factor
- Optical feedback
- Optical fiber
- Vertical-cavity surface-emitting laser
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering