Dual-Frequency Defect-Mode Lasing in Aperiodic Distributed Feedback Cavities

In this letter, we aim to provide the first in-depth study of a multiband hologram filter response under the influence of gain. We find that these aperiodic distributed feedback (ADFB) gratings, which are essentially computer optimized digital holograms, can be inverse designed to possess multiple d...

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Bibliographic Details
Published in:IEEE photonics technology letters 2016-08, Vol.28 (15), p.1617-1620
Main Authors: Folland, Thomas G., Chakraborty, Subhasish
Format: Article
Language:English
Subjects:
Cavity resonators
Cost function
Delays
Distributed Feedback Lasers
Feedback
Gratings
Holes
Holograms
Holography
Inverse
Laser Resonators
Lasers
Lasing
Lattices
Photonic band gaps
Resonant frequency
Semiconductor Lasers
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Summary:In this letter, we aim to provide the first in-depth study of a multiband hologram filter response under the influence of gain. We find that these aperiodic distributed feedback (ADFB) gratings, which are essentially computer optimized digital holograms, can be inverse designed to possess multiple defectlike modes analogous to those present in quarter-wave phase shifted gratings. We attribute this phenomenon to the interaction between multiple photonic band gaps in ADFB cavities. Further examination of the ADFB gratings reveal that the defect-mode lasing solutions are insensitive to the variations of the grating feedback strength (κ). This result in particular, which has important significance to minimize error in fabrication, is confirmed against published experimental data for an ADFB laser.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2016.2561079