ORPHEUS-PS is a narrow-bandwidth optical parametric amplifier (OPA), designed for PHAROS and CARBIDE lasers. The device is pumped by 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 energy stability compared to other methods for generating tunable picosecond pulses. The white-light generation is integrated into the same housing as the amplification, enabling high 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 pump laser radiation can be split to simultaneously pump a femtosecond OPA, 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

MAIN Output

Model	ORPHEUS-PS
Tuning range ¹⁾	640 – 1000 nm (Signal) 1060 – 2600 nm (Idler)
Conversion efficiency at peak	> 8% (Signal and Idler combined)
Pulse duration	800 fs – 3 ps
Spectral bandwidth	< 20 cm^-1 @ 700 – 2000 nm
Pulse-to-pulse energy stability ²⁾	< 2% @ 800 nm

For single wavelength (515 nm) picosecond output, refer to SHBC.
Expressed as NRMSD (normalized root mean squared deviation).

AUXILIARY OUTPUT 1 (515 nm)

Model	ORPHEUS-PS
Wavelength ¹⁾	515 nm ± 5 nm
Generation efficiency ²⁾	> 15%

Direct SHBC output, not simultaneous to OPA; see details in SHBC specifications.
Specified as percentage of pump pulse energy.

AUXILIARY OUTPUT 2 (1030 nm)

Model	ORPHEUS-PS
Wavelength ¹⁾	1030 ± 10 nm
Pulse duration	< 300 fs
Pulse energy	> 5 µJ

Compressed pump output.

Wavelength extension

Model	ORPHEUS-PS
SH package at peak 320 – 500 nm (SHS), 530 – 640 nm (SHI)	> 3%
FH package at peak 210 – 250 nm (FHS), 265 – 320 nm (FHI)	> 0.3% ¹⁾
2400 – 4800 nm (DFG)	> 0.25% @ 3200 nm ¹⁾

For > 200 µJ pump pulse energy.

Pump Laser Requirements

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