TY - JOUR

T1 - Observation of flattened power spectrum of chaotic semiconductor laser using an optical filter

AU - Han, Hong

AU - Zhao, Tong

AU - Wang, An Bang

AU - Wang, Da Ming

AU - Wang, Long Sheng

AU - Wang, Yun Cai

AU - Shore, K. Alan

PY - 2019/6

Y1 - 2019/6

N2 - The authors experimentally demonstrate that the spectral flatness of chaotic light from an external-cavity feedback semiconductor laser is significantly improved using a fibre Bragg grating. The effects of detuning between the Bragg frequency and chaotic frequency on the bandwidth and spectral flatness are both investigated. The flatness of the power spectrum is enhanced to ±1.4 dB whilst maintaining the spectral bandwidth at around 8 GHz. The experimental results are in accordance with theoretical predictions which also have shown that the spectral flatness decreases initially then increases with increasing the 3 dB bandwidth of grating. A flattened spectrum with a low-pass energy distribution increases the utilisation efficiency of chaotic light in chaotic radar and reflectometry.

AB - The authors experimentally demonstrate that the spectral flatness of chaotic light from an external-cavity feedback semiconductor laser is significantly improved using a fibre Bragg grating. The effects of detuning between the Bragg frequency and chaotic frequency on the bandwidth and spectral flatness are both investigated. The flatness of the power spectrum is enhanced to ±1.4 dB whilst maintaining the spectral bandwidth at around 8 GHz. The experimental results are in accordance with theoretical predictions which also have shown that the spectral flatness decreases initially then increases with increasing the 3 dB bandwidth of grating. A flattened spectrum with a low-pass energy distribution increases the utilisation efficiency of chaotic light in chaotic radar and reflectometry.

KW - laser cavity resonators

KW - Bragg gratings

KW - optical chaos

KW - laser feedback

KW - semiconductor lasers

KW - optical fibre filters

KW - low-pass energy distribution

KW - Bragg frequency

KW - spectral bandwidth

KW - chaotic frequency

KW - fibre Bragg grating

KW - external-cavity feedback semiconductor laser

KW - chaotic light

KW - spectral flatness

KW - optical filter

KW - chaotic semiconductor laser

KW - flattened power spectrum

KW - reflectometry

KW - chaotic radar

U2 - 10.1049/iet-opt.2018.5024

DO - 10.1049/iet-opt.2018.5024

M3 - Article

VL - 13

SP - 104

EP - 108

JO - IET Optoelectronics

JF - IET Optoelectronics

SN - 1751-8768

IS - 3

ER -