Spectral linewidth analysis of semiconductor hybrid lasers with feedback from an external waveguide resonator circuit

Youwen Fan, Rob E.M. Lammerink, Jesse Mak, R.M. Oldenbeuving, P.J.M. van der Slot, Klaus J. Boller

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Abstract

We present a detailed analysis of a semiconductor hybrid laser exploiting spectral control from an external photonic waveguide circuit that provides frequency-selective feedback. Based on a spatially resolved transmission line model (TLM), we have investigated the output power, emission frequency, and the laser spectral linewidth. We find that, if the feedback becomes weaker, the spectral linewidth is larger than predicted by previous models that are based on a modified mean-field approximation, even if these take a strong spatial variation of the gain into account. The observed excess linewidth is caused by additional index fluctuations that are associated with strong spatial gain variations.
Original languageEnglish
Pages (from-to)32767-32782
JournalOptics express
Volume25
Issue number26
DOIs
Publication statusPublished - 25 Dec 2017

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spectrum analysis
resonators
waveguides
lasers
transmission lines
photonics
output
approximation

Cite this

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title = "Spectral linewidth analysis of semiconductor hybrid lasers with feedback from an external waveguide resonator circuit",
abstract = "We present a detailed analysis of a semiconductor hybrid laser exploiting spectral control from an external photonic waveguide circuit that provides frequency-selective feedback. Based on a spatially resolved transmission line model (TLM), we have investigated the output power, emission frequency, and the laser spectral linewidth. We find that, if the feedback becomes weaker, the spectral linewidth is larger than predicted by previous models that are based on a modified mean-field approximation, even if these take a strong spatial variation of the gain into account. The observed excess linewidth is caused by additional index fluctuations that are associated with strong spatial gain variations.",
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Spectral linewidth analysis of semiconductor hybrid lasers with feedback from an external waveguide resonator circuit. / Fan, Youwen ; Lammerink, Rob E.M.; Mak, Jesse ; Oldenbeuving, R.M.; van der Slot, P.J.M.; Boller, Klaus J.

In: Optics express, Vol. 25, No. 26, 25.12.2017, p. 32767-32782.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Spectral linewidth analysis of semiconductor hybrid lasers with feedback from an external waveguide resonator circuit

AU - Fan, Youwen

AU - Lammerink, Rob E.M.

AU - Mak, Jesse

AU - Oldenbeuving, R.M.

AU - van der Slot, P.J.M.

AU - Boller, Klaus J.

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N2 - We present a detailed analysis of a semiconductor hybrid laser exploiting spectral control from an external photonic waveguide circuit that provides frequency-selective feedback. Based on a spatially resolved transmission line model (TLM), we have investigated the output power, emission frequency, and the laser spectral linewidth. We find that, if the feedback becomes weaker, the spectral linewidth is larger than predicted by previous models that are based on a modified mean-field approximation, even if these take a strong spatial variation of the gain into account. The observed excess linewidth is caused by additional index fluctuations that are associated with strong spatial gain variations.

AB - We present a detailed analysis of a semiconductor hybrid laser exploiting spectral control from an external photonic waveguide circuit that provides frequency-selective feedback. Based on a spatially resolved transmission line model (TLM), we have investigated the output power, emission frequency, and the laser spectral linewidth. We find that, if the feedback becomes weaker, the spectral linewidth is larger than predicted by previous models that are based on a modified mean-field approximation, even if these take a strong spatial variation of the gain into account. The observed excess linewidth is caused by additional index fluctuations that are associated with strong spatial gain variations.

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DO - 10.1364/OE.25.032767

M3 - Article

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