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Eckhaus Instability in Laser Cavities with Harmonically Swept Filters

In this paper, we report the existence of Eckhaus instability in laser cavities with harmonically swept filters, of which Fourier Domain Mode Locked (FDML) laser is an important example. We show that such laser cavities can be modeled by a real Ginzburg Landau equation with a frequency shifting term arisen from the cavity dispersion. We analytically derived a solution of the governing equation and analyzed its stability. We found that the cavity dispersion introduces a continuous frequency shift to the laser signal such that it will be eventually pushed outside the stable region and trigger the Eckhaus instability. We show that the repeated triggering of the Eckhaus instability in the laser cavities is the dominant effect that leads to the high frequency fluctuations in FDML laser output, which is the unique feature of such laser cavities and intrinsically limits the signal quality of the FDML lasers with nonzero cavity dispersion.

Ketersediaan

Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.39 No.20 October 15 2021

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 6531-6538

Bahasa

English

ISBN/ISSN

-

Klasifikasi

NONE

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

FOURIER DOMAIN MODE LOCKING
ECKHAUS INSTABILITY
REAL GINZBURG LANDAU EQUATION
SWEPT LASER

Info Detail Spesifik

DOI: 10.1109/JLT.2021.3104186

Pernyataan Tanggungjawab

Feng Li, Dongmei Huang, K. Nakkeeran, J. Nathan Kutz, Jinhui Yuan, P. K. A. Wai

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