Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optimization of filter frequency ratio in pseudo random modulated fiber amplifiers for maximally suppressing stimulated Brillouin scattering

Not Accessible

Your library or personal account may give you access

Abstract

A filtered pseudorandom binary sequence (PRBS) phase modulation scheme to broaden the linewidth of a fiber laser has previously been shown to simultaneously enhance stimulated Brillouin scattering (SBS) suppression and spectral brightness relative to a fiber laser under an unfiltered modulation scheme. We examined in detail the unwanted distortions to the broadened spectrum of an optical signal due to the low-pass filtering of the PRBS modulation signal, and show how one can navigate these deleterious effects for an optimal filtering strategy for SBS suppression. Through numerical simulations of the filtering effects on the optical spectrum, we determined the optimal ratios of the filter bandwidth to the PRBS modulation frequency to be 0.63, 0.56, 0.50, and 0.44 for bit numbers $k = {7}$, 8, 9, 10, respectively. A cursory experimental study for the $k = {7}$ case verified the approach, which provides a more precise filtering-to-modulation frequency ratio for improved SBS suppression than the more general guideline of filtering at approximately half the modulation frequency reported in the literature. Applying this optimization strategy with a filtered 4.6 GHz PRBS scheme, we demonstrated a 1 kW, ${\rm M^2}\;\sim\;{1.27}$, all-fiberized narrow linewidth amplifier.

© 2022 Optical Society of America

Full Article  |  PDF Article
More Like This
Filtered pseudo random modulated fiber amplifier with enhanced coherence and nonlinear suppression

Brian M. Anderson, Angel Flores, and Iyad Dajani
Opt. Express 25(15) 17671-17682 (2017)

Optimization and visualization of phase modulation with filtered and amplified maximal-length sequence for SBS suppression in a short fiber system: a theoretical treatment

Yifeng Yang, Binglin Li, Meizhong Liu, Xuchen Huang, Yutong Feng, Dan Cheng, Bing He, Jun Zhou, and Johan Nilsson
Opt. Express 29(11) 16781-16803 (2021)

Theoretical study of filtered and amplified PRBS phase modulation for SBS suppression in a 2.5 kW, 10 GHz monolithic fiber amplifier

He Wang, Yifeng Yang, Yike Ren, Wei Xie, Xiaolong Chen, Kai Liu, Xiaoqiang Xiong, Junqing Meng, and Bing He
Opt. Express 32(5) 7090-7104 (2024)

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (20)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved