Abstract
We report on a simple method with a high spectral and spatial resolution for mapping variations in the cavity resonance of a plano-planar broad-area laser based on frequency-selective feedback. The demonstration experiment uses a vertical-cavity surface-emitting-laser (VCSEL), in which growth induced inhomogeneities are of particular importance. It relies only on a standalone laser with a narrow-bandwidth passive filter avoiding the need for an expensive tunable laser or high-resolution spectrometer.
Original language | English |
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Pages (from-to) | 1079-1081 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 37 |
Issue number | 6 |
DOIs | |
Publication status | Published - 15 Mar 2012 |