4.35 kW peak power femtosecond pulse mode-locked VECSEL for supercontinuum generation

Optics Express (Impact Factor: 3.49). 01/2013; 21(2):1599-605. DOI: 10.1364/OE.21.001599
Source: PubMed


We report a passively mode-locked vertical external cavity surface emitting laser (VECSEL) producing 400 fs pulses with 4.35 kW peak power. The average output power was 3.3 W and the VECSEL had a repetition rate of 1.67 GHz at a center wavelength of 1013 nm. A near-antiresonant, substrate-removed, 10 quantum well (QW) gain structure designed to enable femtosecond pulse operation is used. A SESAM which uses fast carrier recombination at the semiconductor surface and the optical Stark effect enables passive mode-locking. When 1 W of the VECSEL output is launched into a 2 m long photonic crystal fiber (PCF) with a 2.2 µm core, a supercontinuum spanning 175 nm, with average power 0.5 W is produced.

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    • "I N recent years, vertical-external-cavity surface-emitting lasers (VECSELs) have revealed their potential to serve as a versatile platform for the realization of various laser emission schemes [1]–[6]. These lasers combine the advantages of both traditional diode lasers and vertical-emitting lasers, ensuring both high power operation and an excellent beam quality [7]–[9]. "
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    ABSTRACT: We present extensive measurements of the pump-dependent dynamics of antiphase noise in a dual-wavelength multimode vertical-external-cavity surface-emitting laser (VECSEL). We show that antiphase noise at frequencies below 10 kHz dominates the relative-intensity noise spectrum in the emission of a dual-wavelength VECSEL due to gain competition between the two-lasing wavelengths. We observe that with increasing pump power the antiphase noise decreases in amplitude but increases in bandwidth. Surprisingly, at even higher pump powers the spectral extent of the antiphase noise narrows significantly. The results provide information critical to potential applications of dual-wavelength VECSELs, such as intracavity parametric frequency conversion.
    IEEE Photonics Technology Letters 10/2015; 27(19):1-1. DOI:10.1109/LPT.2015.2449656 · 2.11 Impact Factor
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    • "Up-to-date, mode-locking of VECSELs required using resonator-integrated [9] [15] or chip-integrated [16] semiconductor saturable-absorber mirrors (SESAMs). Indeed, besides semiconductor materials, saturable absorbers as graphene [17] [18] and carbon nanotubes [19] have also been employed for ML operation of VECSELs. "
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    SPIE Photonics West 2015, Vertical External Cavity Surface Emitting Lasers (VECSELs) V, San Francisco, CA; United States; 02/2015
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    • "VECSELs combine the advantages of semiconductor laser technology, such as compact footprint (down to∼3mm cavity length[8]), with the benefits of diode pumped solidstate lasers, such as low timing jitter[9], excellent beam quality[10], high average[10] [11] and peak power[6] [12]. "
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