ORPHEUS-PS is a narrow-bandwidth optical parametric amplifier, designed for PHAROS and CARBIDE lasers. This device is pumped by the picosecond pulses produced in a second harmonic bandwidth compressor SHBC and is seeded by a white-light continuum generated by femtosecond pulses. This enables very high pulse-to-pulse stability compared to other methods of generating tunable picosecond pulses. The white-light generation module is integrated into the same housing as the amplification modules, enabling even better long-term stability and ease of use. The system features high conversion efficiency, bandwidth- and diffraction-limited output, and full computer control.

Part of the laser radiation can be split to simultaneously pump a femtosecond OPA, providing broad-bandwidth 630 nm – 16 μm tunable pulses, giving access to the complete set of beams necessary for versatile spectroscopy applications such as femtosecond stimulated Raman spectroscopy (FSRS) and sum-frequency generation (SFG) spectroscopy.

Applications

Femtosecond stimulated Raman spectroscopy (FSRS)
Sum-frequency generation (SFG) spectroscopy

Output from ORPHEUS-PS

Model	ORPHEUS-PS
Tuning range	640 – 1000 nm (Signal) 1060 – 2600 nm (Idler)
Conversion efficiency at peak	> 8% (Signal and Idler combined)
Spectral bandwidth	< 20 cm^-1 @ 700 – 2000 nm
Pulse duration	800 fs – 3 ps
Pulse-to-pulse energy stability ¹⁾	< 2% @ 700 – 960 nm & 1100 – 1500 nm
SHBC output pulse energy ²⁾	> 15% of pump
Compressed pump output	1030 nm, < 300 fs, > 5 µJ

Expressed as NRMSD (normalized root mean squared deviation).
515 nm output port available, not simultaneous to OPA output.

Optional wavelength extensions

Model		ORPHEUS-PS
SH	Tuning range	320 – 500 nm (SHS) 530 – 640 nm (SHI)
SH	Conversion efficiency	> 3% at peak
FH	Tuning range	210 – 250 nm (FHS) 265 – 320 nm (FHI)
FH	Conversion efficiency	> 0.3% at peak (for > 200 µJ pump energy)
DFG	Tuning range	2400 – 4800 nm
DFG	Conversion efficiency	> 0.25% at 3200 nm (for > 200 µJ pump energy)

Pump Laser Requirements

Model	ORPHEUS-PS
Pump laser	PHAROS or CARBIDE with uncompressed output option
Wavelength	1030 ± 10 nm
Maximum pump power	20 W
Repetition rate	Single-shot – 100 kHz
Pump pulse energy	100 μJ – 3.2 mJ

Performance charts

Orpheus-PS tuning curves.
Pump: 5 W, 1000 µJ, 5 kHz from PHAROS-SP.

For custom tuning curves visit Optics ToolBox.

Drawings

ORPHEUS-PS drawing

ORPHEUS-PS with SHBC drawing

Publications

Incoherent phonon population and exciton-exciton annihilation dynamics in monolayer WS2 revealed by time-resolved Resonance Raman scattering

S. Han, C. Boguschewski, Y. Gao, L. Xiao, J. Zhu, and P. H. M. van Loosdrecht, Optics Express 21 (27), 29949 (2019).

A tunable time-resolved spontaneous Raman spectroscopy setup for probing ultrafast collective excitation and quasiparticle dynamics in quantum materials

R. B. Versteeg, J. Zhu, P. Padmanabhan, C. Boguschewski, R. German, M. Goedecke, P. Becker, and P. H. M. van Loosdrecht, Structural Dynamics 4 (5), 044301 (2018).

Stimulated Raman scattering PHAROS SHBC ORPHEUS ORPHEUS-PS