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Phase-stabilized, 15 W frequency comb at 28–48 μm

2009; Optica Publishing Group; Volume: 34; Issue: 9 Linguagem: Inglês

10.1364/ol.34.001330

1539-4794

Florian Adler, Kevin C. Cossel, Michael J. Thorpe, Ingmar Hartl, M. E. Fermann, Jun Ye,

Laser-Matter Interactions and Applications

We present a high-power optical-parametric-oscillator (OPO) based frequency comb in the mid-IR wavelength region. The system employs periodically poled lithium niobate and is singly resonant for the signal. It is synchronously pumped by a 10 W femtosecond Yb:fiber laser centered at 1.07 microm. The idler (signal) wavelength can be continuously tuned from 2.8 to 4.8 microm (1.76 to 1.37 microm) with a simultaneous bandwidth as high as 0.3 microm and a maximum average idler output power of 1.50 W. We also demonstrate the performance of the stabilized comb by recording the heterodyne beat with a narrow-linewidth diode laser. This OPO is an ideal source for frequency comb spectroscopy in the mid-IR.