Noncollinear Parametric Oscillator (NOPO)
NOPO’s are light sources, covering an ultra wide and ultra fast tunability as well as the flexibility in spectral width from a narrowband to an ultra broadband spectrum. Our system is build up in a noncollinear configuration to support an ultra wide and fast tunability. Because of the power scalability of our system we are able to extract more than 3 W from the visible up to the infrared part of the spectrum. A unique feature is the speed of tuning. As shown in the figure we are able to ramp the center wavelength of the fs -light pulses with more than 100 000 nm/s.
- T. Binhammer, S. Rausch, M. Jackstadt, G. Palmer, and U. Morgner. "Phase-stable Ti:sapphire oscillator quasi-synchronously pumped by a thin-disk laser". Applied Physics B: Lasers and Optics, 100:219–223, 2010.
- T. Lang, T. Binhammer, S. Rausch, G. Palmer, M. Emons, M. Schultze, A. Harth, and U. Morgner, "High power ultra-widely tuneable femtosecond pulses from a non-collinear optical parametric oscillator (NOPO)," Opt. Express 20, 912-917 (2012).
The frond-end of our Optical Parametric Chirped Pulse Amplification (OPCPA) is a broadband Ti:sapphier oscillator (link), which delivers the seed for the parametric amplification and a small fraction at 1030 nm provides the seed for a homebuilt regenerative amplifier (link).
With a double-stage NOPA setup, where both pump frequencies are the SHG of 1030 nm, we measured CEP stabilized two-cycle pulses with sub 6 fs of pulse duration and more than 3 µJ pulse energy at 143 kHz.
A double-stage NOPA pumped with the SHG and the THG of 1030 nm, delivers 1 µJ at 200 kHz with a spectrum spanning from 430 nm to 1.3 µm supporting an almost single-cycle pulse. We measured pulse durations of sub 5 fs using a broadband double chirped mirror pair for pulse compressing of a part of the whole output spectrum.
- Marcel Schultze, Thomas Binhammer, Andy Steinmann, Guido Palmer, Moritz Emons, and Uwe Morgner (2010): Few-cycle OPCPA system at 143 kHz with more than 1 µJ of pulse energy, Opt. Express 18, No. 3, pp. 2836-2841
- Marcel Schultze, Thomas Binhammer, Guido Palmer, Moritz Emons, Tino Lang, and Uwe Morgner (2010): Multi-μJ, CEP-stabilized, two-cycle pulses from an OPCPA system with up to 500 kHz repetition rate, Optics Express 18, Issue 26, pp. 27291- 27297, (2010)
- A. Harth, M. Schultze, T. Lang, T. Binhammer, S. Rausch, and U. Morgner, "Two-color pumped OPCPA system emitting spectra spanning 1.5 octaves from VIS to NIR," Opt. Express 20, 3076-3081 (2012).
Non-Collinear Optical Parametric Amplifier (NOPA)
The non-collinear optical parametric amplifier (NOPA) in our lab delivers sub-10-fs pulses with 420 nJ of pulse energy. The NOPA is driven by microjoule pulses from an home-build Yb:KYW oscillator with cavity-dumping and a subsequent single-stage rod-type fiber amplifier at 1-MHz repetition rate. The ultrabroad-band seed is based on stable white-light generation from 420 fs long pulses in a YAG plate. This system is used for different applications like two-photon-polymerization (2PP) , CARS and OCT.
- G. Palmer, M. Emons, M. Siegel, A. Steinmann, M. Schultze, M. Lederer, and U. Morgner, “Passively modelocked and cavity-dumped Yb:KY(WO4)2 oscillator with positive dispersion,” Opt. Express 15, 16017–16021 (2007).
- A. Steinmann, G. Palmer, M. Emons, M. Siegel, and U. Morgner, “Generation of 9-µJ 420-fs Pulses by Fiber- Based Amplification of a Cavity-Dumped Yb:KYW Laser Oscillator,” Laser Phys. 18, 527–529 (2008).
- Moritz Emons, Andy Steinmann, Thomas Binhammer, Guido Palmer, Marcel Schultze, and Uwe Morgner, "Sub-10-fs pulses from a MHz-NOPA with pulse energies of 0.4 μJ“, Optics Express 18, 1191-1196 (2010).
- T. Lang, A. Harth, J. Matyschok, T. Binhammer, M. Schultze, and U. Morgner, "Impact of temporal, spatial and cascaded effects on the pulse formation in ultra-broadband parametric amplifiers," Opt. Express 21, 949-959 (2013)