Abstract
We report the first optical parametric oscillator synchronously pumped by a SESAM modelocked vertical external-cavity surface-emitting laser (VECSEL). As a nonlinear medium, we use a periodically poled MgO:PPLN crystal. The VECSEL operates at a wavelength of 982 nm and a repetition rate of 198 MHz. The pump radiation is converted to signal and idler wavelengths tunable in the ranges of 1.4-1.8 µm and 2.2-3.5 μm, respectively, simply by a change of the poling period and crystal temperature. The signal pulses have a duration between 2 ps to 4 ps and an average output power up to 100 mW.
Highlights
Optically-pumped vertical external-cavity surface-emitting lasers (VECSELs) [1] are a rapidly evolving technology which exhibits a wide spectral coverage in an inexpensive and compact setup [2,3,4,5]
We report the first optical parametric oscillator synchronously pumped by a semiconductor saturable absorber mirror (SESAM) modelocked vertical external-cavity surface-emitting laser (VECSEL)
In this work we present the first ultrafast synchronously VECSEL-pumped optical parametric oscillator (OPO)
Summary
Optically-pumped vertical external-cavity surface-emitting lasers (VECSELs) [1] are a rapidly evolving technology which exhibits a wide spectral coverage in an inexpensive and compact setup [2,3,4,5]. Their foundation on semiconductor technology has the major advantage of emission wavelength flexibility which is achieved by bandgap engineering. In contrast to the demonstrated spectral coverage of VECSELs in the CWregime, pulsed operation has been so far limited to wavelengths up to the 2 μm-range [23] and the best performance is obtained in the spectral region between 800 and 1200 nm [3].
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