Evaluation of the performance of linearly frequency modulated signals generated by heterodyning two free-running laser diodes

Meng xu Chang; Li zhong Jiang; Qing bo Liu; Jing Xu; Yang Chen

doi:10.1007/s11801-021-0103-9

Evaluation of the performance of linearly frequency modulated signals generated by heterodyning two free-running laser diodes

Meng xu Chang
, Li zhong Jiang
, Qing bo Liu
, Jing Xu
, Yang Chen^*

^*Corresponding author for this work

School of Communication and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A method to evaluate the influence of the laser linewidth on the linearly frequency-modulated (LFM) signals generated by heterodyning two free-running laser diodes (LDs) is proposed. The Pearson correlation coefficient between the instantaneous frequency of the generated LFM signal and that of an ideal LFM signal is introduced to quantify the quality of the generated LFM signal. The closed-form solution of the correlation coefficient is given, which shows that the correlation coefficient is determined by the ratio of the LFM signal bandwidth to the square root of the total linewidth of the two LDs when the observation interval is fixed. Simulation results are also given, which proves the correctness of the theoretical results.

Original language	English
Pages (from-to)	266-270
Number of pages	5
Journal	Optoelectronics Letters
Volume	17
Issue number	5
DOIs	https://doi.org/10.1007/s11801-021-0103-9
State	Published - May 2021

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10.1007/s11801-021-0103-9

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title = "Evaluation of the performance of linearly frequency modulated signals generated by heterodyning two free-running laser diodes",

abstract = "A method to evaluate the influence of the laser linewidth on the linearly frequency-modulated (LFM) signals generated by heterodyning two free-running laser diodes (LDs) is proposed. The Pearson correlation coefficient between the instantaneous frequency of the generated LFM signal and that of an ideal LFM signal is introduced to quantify the quality of the generated LFM signal. The closed-form solution of the correlation coefficient is given, which shows that the correlation coefficient is determined by the ratio of the LFM signal bandwidth to the square root of the total linewidth of the two LDs when the observation interval is fixed. Simulation results are also given, which proves the correctness of the theoretical results.",

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author = "Chang, \{Meng xu\} and Jiang, \{Li zhong\} and Liu, \{Qing bo\} and Jing Xu and Yang Chen",

note = "Publisher Copyright: {\textcopyright} 2021, Tianjin University of Technology.",

year = "2021",

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doi = "10.1007/s11801-021-0103-9",

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T1 - Evaluation of the performance of linearly frequency modulated signals generated by heterodyning two free-running laser diodes

AU - Chang, Meng xu

AU - Jiang, Li zhong

AU - Liu, Qing bo

AU - Xu, Jing

AU - Chen, Yang

PY - 2021/5

Y1 - 2021/5

N2 - A method to evaluate the influence of the laser linewidth on the linearly frequency-modulated (LFM) signals generated by heterodyning two free-running laser diodes (LDs) is proposed. The Pearson correlation coefficient between the instantaneous frequency of the generated LFM signal and that of an ideal LFM signal is introduced to quantify the quality of the generated LFM signal. The closed-form solution of the correlation coefficient is given, which shows that the correlation coefficient is determined by the ratio of the LFM signal bandwidth to the square root of the total linewidth of the two LDs when the observation interval is fixed. Simulation results are also given, which proves the correctness of the theoretical results.

AB - A method to evaluate the influence of the laser linewidth on the linearly frequency-modulated (LFM) signals generated by heterodyning two free-running laser diodes (LDs) is proposed. The Pearson correlation coefficient between the instantaneous frequency of the generated LFM signal and that of an ideal LFM signal is introduced to quantify the quality of the generated LFM signal. The closed-form solution of the correlation coefficient is given, which shows that the correlation coefficient is determined by the ratio of the LFM signal bandwidth to the square root of the total linewidth of the two LDs when the observation interval is fixed. Simulation results are also given, which proves the correctness of the theoretical results.

KW - A

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SN - 1673-1905

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SP - 266

EP - 270

JO - Optoelectronics Letters

JF - Optoelectronics Letters

IS - 5

ER -

Evaluation of the performance of linearly frequency modulated signals generated by heterodyning two free-running laser diodes

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