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Time frequency distributions of optical sources (I): directly modulated semiconductor lasers
Abstract
We develop a time frequency framework for the dynamics of directly modulated semiconductor lasers in which the optical field obtained from the singlemode rate equations is represented by distributions of Cohen class. Closed form small signal solutions are derived for RC filtered square current pulses and for sinusoidal modulation, including the exact chirp to power ratio with gain compression and spontaneous emission and a line expansion of the Wigner distribution of the sinusoidally modulated field. Kernels satisfying two known conditions return the laser chirp as the first conditional moment.
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BibTeX
@misc{capmany2026time,
title = {{Time frequency distributions of optical sources (I): directly modulated semiconductor lasers}},
author = {Jose Capmany},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.06143},
eprint = {2610.06143},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.06143},
}
RIS
TY - UNPB
TI - Time frequency distributions of optical sources (I): directly modulated semiconductor lasers
AU - Jose Capmany
PY - 2026
DA - 2026/10/05
PB - arXiv
DO - 10.48550/arxiv.2610.06143
UR - https://arxiv.org/abs/2610.06143
AB - We develop a time frequency framework for the dynamics of directly modulated semiconductor lasers in which the optical field obtained from the singlemode rate equations is represented by distributions of Cohen class. Closed form small signal solutions are derived for RC filtered square current pulses and for sinusoidal modulation, including the exact chirp to power ratio with gain compression and spontaneous emission and a line expansion of the Wigner distribution of the sinusoidally modulated field. Kernels satisfying two known conditions return the laser chirp as the first conditional moment.
ER -