Linear frequency swept laser source with high swept slope based on digital optical phase-locked loop

Li，Peng1; Zhang，Yating1; Yao，Jianquan1,2

2022-12-15

10.1016/j.optcom.2022.128860

OPTICS COMMUNICATIONS   Impact Factor & Quartile

0030-4018

1873-0310

We present a method for generating linearly frequency swept optical waves using a digital optical phase-locked loop. The slope and shape of the optical frequency swept is locked to a constant reference frequency, which is controlled by a program. The method enables precise control of lasers with nonlinear tuning characteristics, and achieves a high linearity of frequency swept optical wave, thus providing a stable and highly coherent frequency swept optical source for laser ranging, velocimetry and 3D imaging. Experimentally, we achieve a frequency swept bandwidth of 31.1 GHz with a frequency swept slope of 518 THz/s using a distributed feedback laser diode (DFB-LD). In addition, we analyzed the linearity of the frequency-swept optical wave after phase-locking, and the root mean square (RMS) value of the frequency swept nonlinearity was below 1.4 MHz.

Digital optical phase-locked loop Frequency swept nonlinearity Internal modulation Linear frequency swept laser source

EI ; SCI

English

Others

National Key Research and Development Program of China[2017YFA0700202];National Key Research and Development Program of China[2021YFB2800703];National Natural Science Foundation of China[61735010];National Natural Science Foundation of China[91838301];

Optics

Optics

WOS:000890482000019

ELSEVIER

20223412606944

Distributed feedback lasers ; Laser mode locking ; Nonlinear optics ; Optical feedback ; Optical signal processing ; Phase locked loops

Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers:713.5 ; Nonlinear Optics:741.1.1 ; Lasers, General:744.1

PHYSICS

2-s2.0-85136141256

Scopus

1.Key Laboratory of the Ministry of Education on Optoelectronic Information Technology,School of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin,300072,China
2.Department of Electrical and Electronic Engineering,South University of Science and Technology of China,Shenzhen,518055,China

Li，Peng,Zhang，Yating,Yao，Jianquan. Linear frequency swept laser source with high swept slope based on digital optical phase-locked loop[J]. OPTICS COMMUNICATIONS,2022,525.

Li，Peng,Zhang，Yating,&Yao，Jianquan.(2022).Linear frequency swept laser source with high swept slope based on digital optical phase-locked loop.OPTICS COMMUNICATIONS,525.

Li，Peng,et al."Linear frequency swept laser source with high swept slope based on digital optical phase-locked loop".OPTICS COMMUNICATIONS 525(2022).