Picosecond supercontinuum laser with consistent emission parameters over variable repetition rates from 1 to 40 MHz

Schönau, Thomas; Siebert, Thorsten; Härtel, Romano; Klemme, Dietmar; Lauritsen, Kristian; Erdmann, Rainer

doi:10.1117/12.2003859

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2014

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“…Combined with an all-fiber based amplifier, the low-power output of the laser diode can be amplified to high peak-power pulses emitted with excellent beam quality [15][16][17][18]. Such a laser source has drawn great interest for many applications, including also the realization of versatile supercontinuum light sources [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Picosecond supercontinuum light source for stroboscopic white-light interferometry with freely adjustable pulse repetition rate

Novotny¹,

Durairaj²,

Shavrin³

et al. 2014

Opt. Express

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We present a picosecond supercontinuum light source designed for stroboscopic white-light interferometry. This source offers a potential for high-resolution characterization of vibrational fields in electromechanical components with frequencies up to the GHz range. The light source concept combines a gain-switched laser diode, the output of which is amplified in a two-stage fiber amplifier, with supercontinuum generation in a microstructured optical fiber. Implemented in our white-light interferometer setup, optical pulses with optimized spectral properties and below 310 ps duration are used for stroboscopic illumination at freely adjustable repetition rates. The performance of the source is demonstrated by characterizing the surface vibration field of a square-plate silicon MEMS resonator at 3.37 MHz. A minimum detectable vibration amplitude of less than 100 pm is reached.

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