Octave-spanning coherent supercontinuum generation in a step-index tellurite fiber and towards few-cycle pulse compression at 2 μm

OPTICS COMMUNICATIONS

卷:488

Article

Kibler, B.¹  Lemiere, A.¹  Gomes, J. -T.^2,3  Gaponov, D.²  Lavoute, L.²  Desevedavy, F.¹  Smektala, F.¹ 

[1] Univ Bourgogne Franche Comte, CNRS, UMR 6303, Lab Interdisciplinaire Carnot Bourgogne, F-21078 Dijon, France

[2] Novae, 15 Rue Sismondi, F-87000 Limoges, France

[3] Leukos, 2 Rue Edouard Michaud Beaublanc,Bat 3-4-5, F-87000 Limoges, France

关键词: Nonlinear fiber optics;    Supercontinuum generation;    Pulse compression;    Infrared fibers;   

DOI  :  10.1016/j.optcom.2021.126853

来源: Elsevier

【 摘 要 】

We experimentally demonstrate 140-THz bandwidth (at ?20 dB) supercontinuum generation in a 10 cm-long all-normal dispersion step-index tellurite fiber pumped by a turn-key femtosecond fiber laser emitting at 2.11 ?m at a repetition rate of 19 MHz. The soliton self-frequency shifted thulium-doped fiber mode-locked laser emits initial transform-limited pulses, with 85-fs pulse duration, that are subsequently quasi-linearly chirped (over more than 50 THz) during the above nJ-level nonlinear propagation. Moreover, we numerically demonstrate the possible pulse compression down to 12 fs by means of additional linear propagation in a standard step-index fluoride fiber with anomalous dispersion.

【 授权许可】

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