title: Frequency doubling of a passively mode-locked monolithic distributed Bragg reflector diode laser.
abstract: In this work, frequency doubling of a passively mode-locked 3.5 mm long monolithic distributed Bragg reflector diode laser is investigated experimentally. At 1064 nm, optical pulses with a duration of 12.4 ps are generated at a repetition rate of 13 GHz and a peak power of 825 mW, resulting in an average power of 133 mW. Second-harmonic generation is carried out in a periodically poled MgO-doped LiNbO₃ ridge waveguide at a normalized nonlinear conversion efficiency of 930%/W. A maximum average second-harmonic power of 40.9 mW, corresponding to a pulse energy of 3.15 pJ, is reached in the experiment at an opto-optical conversion efficiency of 30.8%. The normalized nonlinear conversion efficiency in mode-locked operation is more than 2 times larger compared to continuous-wave operation.
authors.forename: D
authors.initials: D
authors.lastname: Jedrzejczyk
authors.forename: T
authors.initials: T
authors.lastname: Prziwarka
authors.forename: A
authors.initials: A
authors.lastname: Klehr
authors.forename: O
authors.initials: O
authors.lastname: Brox
authors.forename: H
authors.initials: H
authors.lastname: Wenzel
authors.forename: K
authors.initials: K
authors.lastname: Paschke
authors.forename: G
authors.initials: G
authors.lastname: Erbert