TY - JOUR
T1 - Time Domain Discrete Fourier Domain Mode Locked Laser with k-Space Uniform Comb Lines
AU - Huang, Dongmei
AU - Li, Feng
AU - Cheng, Zihao
AU - Feng, Xinhuan
AU - WAI, Alex
N1 - Funding Information:
Manuscript received November 5, 2020; revised January 3, 2021; accepted January 20, 2021. Date of publication January 25, 2021; date of current version May 2, 2021. This work was supported in part by the National Key R&D Program of China under Grant 2020YFB1805901; in part by the Shenzhen Science and Technology Innovation Commission under Grant SGDX2019081623060558; in part by the Research Grant Council of Hong Kong SAR under Grant PolyU152241/18E; and in part by The Hong Kong Polytechnic University under Grant 1-BBAJ and Grant 1-ZVGB, (Corresponding author: Feng Li.) Dongmei Huang is with the Photonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong and also with the Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China (e-mail: meihk.huang@polyu.edu.hk).
Publisher Copyright:
© 1983-2012 IEEE.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - Frequency comb swept lasers or wavelength stepped swept lasers with comb filters have been proposed in optical domain subsampling or circular-ranging optical coherence tomography (OCT) to achieve high axial scan rate and extended imaging range with a given acquisition bandwidth. However, the comb filters lack flexibility in varying the free spectral range (FSR). In this article, we propose and demonstrate a novel discrete Fourier domain mode locked (FDML) laser by using intracavity optical intensity modulation. Swept signals with comb lines uniformly distributed in the frequency domain is generated with tailor-made pulse patterns according to the sweep trace of the swept filter. Discrete k-space uniform swept signals with different FSRs and pulse durations are generated in the same laser. The FDML laser discretized by temporal modulation is more stable than that with a comb filter. The discrete FDML lasers will be potential sources of OCT and the fast-developing swept source LiDAR.
AB - Frequency comb swept lasers or wavelength stepped swept lasers with comb filters have been proposed in optical domain subsampling or circular-ranging optical coherence tomography (OCT) to achieve high axial scan rate and extended imaging range with a given acquisition bandwidth. However, the comb filters lack flexibility in varying the free spectral range (FSR). In this article, we propose and demonstrate a novel discrete Fourier domain mode locked (FDML) laser by using intracavity optical intensity modulation. Swept signals with comb lines uniformly distributed in the frequency domain is generated with tailor-made pulse patterns according to the sweep trace of the swept filter. Discrete k-space uniform swept signals with different FSRs and pulse durations are generated in the same laser. The FDML laser discretized by temporal modulation is more stable than that with a comb filter. The discrete FDML lasers will be potential sources of OCT and the fast-developing swept source LiDAR.
KW - Fourier domain mode locked laser
KW - optical coherence tomography
KW - time domain modulation
UR - http://www.scopus.com/inward/record.url?scp=85100506597&partnerID=8YFLogxK
U2 - 10.1109/JLT.2021.3054180
DO - 10.1109/JLT.2021.3054180
M3 - Article
AN - SCOPUS:85100506597
SN - 0733-8724
VL - 39
SP - 2949
EP - 2955
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 9
ER -