Open AccessMulti-GHz repetition rate, femtosecond deep ultraviolet source in burst mode derived from an electro-optic comb
Author(s) -
Hanyu Ye,
Lilia Pontagnier,
Clément Dixneuf,
Giorgio Santarelli,
Éric Cormier
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.409782
Subject(s) - burst mode (computing) , femtosecond , optics , materials science , pulse duration , pulse (music) , ultraviolet , optoelectronics , frequency comb , second harmonic generation , laser , physics , detector , electrical engineering , engineering
We present a femtosecond, 11.48 GHz intra-burst repetition rate deep UV source at 258 nm based on forth-harmonic generation (FHG) of an electro-optic (EO) comb operating in burst mode. Second-harmonic generation (SHG) of the burst-mode EO comb in LiB 3 O 5 (LBO) leads to 3.7 W average power and 242 fs root-mean-square pulse duration. A second stage of SHG is further performed using two separate β-BaB 2 O 4 (BBO) crystals, delivering deep UV pulses at 523 mW and 294 mW, with estimated pulse durations of half-ps and sub-300 fs, respectively. At divided pulse repetition rates of 5.7 GHz and 2.9 GHz, FHG is also demonstrated, highlighting the potential of flexible repetition rate operation at the GHz level.