The industrial-grade optical parametric amplifier I-OPA series marks a new era of simplicity in the world of tunable wavelength femtosecond light sources. Based on over 10 years of experience producing the ORPHEUS series of optical parametric amplifiers, this solution brings together the tunability of wavelength with the robust industrial-grade design. The I-OPA is a rugged module attachable to our PHAROS and CARBIDE lasers, providing long-term stability comparable to that of the industrial-grade harmonic generators.

The tunable-wavelength I-OPA (I-OPA-TW) provides a wide tuning range and is primarily intended for spectroscopy and microscopy applications. In particular, the -HP model is targeted to be coupled with our HARPIA spectroscopy system as a pump beam source for ultrafast pump-probe spectroscopy. The -F model is primarily designed as a light source for multiphoton microscopy, the -ONE model – for IR spectroscopy and other applications where high energy mid-IR pulses are desired. All of the models can also be used for micromachining and other industrial applications.

The fixed-wavelength I-OPA (I-OPA-FW) is primarily intended for applications that desire a single-wavelength output. The industrial-grade design provides mechanical stability and eliminates the effects of air-turbulence, minimizing energy fluctuations and ensuring stable long-term performance. The I-OPA-TW is best suited for R&D systems, while the I-OPA-FW is a cost-effective solution for large-scale production.

Video presentation

Specifications of Tunable I-OPA

Model	I‑OPA‑TW‑HP	I‑OPA‑TW‑F	I‑OPA‑TW‑ONE
Configuration	ORPHEUS	ORPHEUS‑F	ORPHEUS‑ONE
Pump power	Up to 40 W
Pump pulse energy	10 – 400 µJ		20 – 400 µJ
Repetition rate	Up to 2 MHz
Tuning range	640 – 1010 nm (Signal) 1050 – 2600 nm (Idler)	650 – 900 nm (Signal) 1200 – 2500 nm (Idler)	1350 – 2000 nm (Signal) 2100 – 4500 nm (Idler)
Conversion efficiency at peak	> 7% @ 700 nm (40 – 400 μJ pump; up to 1 MHz)		> 9% @ 1550 nm (40 – 400 μJ pump; up to 1 MHz)
Conversion efficiency at peak	> 3.5% @ 700 nm (10 – 40 μJ pump; up to 2 MHz)		> 6% @ 1550 nm (20 – 40 μJ pump; up to 2 MHz)
Spectral bandwidth ¹⁾	80 – 220 cm^-1 @ 700 – 960 nm	200 – 1000 cm^-1 @ 650 – 900 nm 150 – 1000 cm^-1 @ 1200 – 2000 nm	60 – 150 cm^-1 @ 1450 – 2000 nm
Pulse duration ^{1) 2)}	120 – 250 fs	< 55 fs @ 800 – 900 nm < 70 fs @ 650 – 800 nm < 100 fs @ 1200 – 2000 nm	100 – 300 fs
Long-term power stability, 8 h	< 1% @ 800 nm		< 1% @ 1550 nm
Pulse-to-pulse energy stability, 1 min	< 1% @ 800 nm		< 1% @ 1550 nm
Wavelength extension options	320 – 505 nm (SHS) ³⁾ 525 – 640 nm (SHI) ³⁾	Contact sales@lightcon.com	4500 – 10000 nm (DFG) ⁴⁾
Pulse compression options ¹⁾	–	SCMP (Signal pulse compressor) ICMP (Idler pulse compressor) GDD-CMP (Compressor with GDD control)	–

I‑OPA‑TW‑F pulses are compressed externally. Typical pulse duration before compression: 120 – 250 fs, after compression: 25 – 70 fs @ 650 – 900 nm, 40 – 100 fs @ 1200 – 2000 nm.
Output pulse duration depends on the selected wavelength and pump laser pulse duration.
Conversion efficiency is 1.2% at peak; specified as the percentage of pump power.
Up to 16 µm tuning range is accessible with an external difference frequency generator.

SPECIFICATIONS of Fixed Wavelength I-OPA

Model	I‑OPA‑FW‑HP	I‑OPA‑FW‑F	I‑OPA‑FW‑ONE
Configuration	ORPHEUS	ORPHEUS‑F	ORPHEUS‑ONE
Pump power	Up to 40 W
Pump pulse energy	10 – 500 µJ		20 – 1000 µJ
Repetition rate	Up to 2 MHz
Wavelength selection range ¹⁾	640 – 1010 nm (Signal) 1050 – 2600 nm (Idler)	650 – 900 nm (Signal) 1200 – 2500 nm (Idler)	1350 – 2000 nm (Signal) 2100 – 4500 nm (Idler)
Conversion efficiency at peak	> 7% @ 700 nm (40 – 500 μJ pump; up to 1 MHz)		> 9% @ 1550 nm (40 – 1000 μJ pump; up to 1 MHz)
Conversion efficiency at peak	> 3.5% @ 700 nm (10 – 40 μJ pump; up to 2 MHz)		> 6% @ 1550 nm (20 – 40 μJ pump; up to 2 MHz)
Spectral bandwidth ²⁾	80 – 220 cm^-1 @ 700 – 960 nm	200 – 1000 cm^-1 @ 650 – 900 nm 150 – 1000 cm^-1 @ 1200 – 2000 nm	60 – 150 cm^-1 @ 1450 – 2000 nm
Pulse duration ^{2) 3)}	120 – 250 fs	< 55 fs @ 800 – 900 nm < 70 fs @ 650 – 800 nm < 100 fs @ 1200 – 2000 nm	150 – 300 fs
Long-term power stability, 8 h	< 1% @ 800 nm		< 1% @ 1550 nm
Pulse-to-pulse energy stability, 1 min	< 1% @ 800 nm		< 1% @ 1550 nm

A fixed wavelength can be selected from the Signal or Idler range. Signal may have accessible Idler pair, and vice versa.
I-OPA-FW-F pulses which are compressed externally. Typical pulse duration before compression: 120 – 250 fs, after compression: 25 – 70 fs @ 650 – 900 nm, 40 – 100 fs @ 1200 – 2000 nm.
Output pulse duration depends on the selected wavelength and pump laser pulse duration.

Comparison with other femtosecond and picosecond lasers

Laser technology	Our solution ¹⁾	Typical performance ²⁾
Laser technology	Our solution ¹⁾	HG or HIRO	I-OPA-FW-HP	I‑OPA‑FW‑F ³⁾	I‑OPA‑FW‑ONE
Excimer (193 nm, 213 nm)	5H of laser (205 nm)	> 20 µJ	–	–	–
3H of Ti:Sapphire (266 nm)	4H of laser (257 nm)	> 40 µJ	–
3H of Nd:YAG (355 nm)	3H of laser (343 nm)	> 100 µJ	> 10 µJ
2H of Nd:YAG (532 nm)	2H of laser (515 nm)	> 200 µJ	> 140 µJ
Ti:Sapphire (800 nm)	OPA (750 – 850 nm)	–	> 25 µJ
Nd:YAG (1064 nm)	Laser (1030 nm)	400 µJ
Cr:Forsterite (1240 nm)	OPA (1200 – 1300 nm)	–	> 14 µJ		–
Erbium (1560 nm)	OPA (1500 – 1600 nm)		> 10 µJ		> 40 µJ
Thulium / Holmium (1950 – 2150 nm)	OPA (1900 – 2200 nm)		> 7 µJ		> 25 µJ
MIR sources (2500 – 4000 nm)	OPA (2500 – 4000 nm)		–		> 5 µJ

OPA output is not limited to the given spectral ranges; see the full ranges in the specifications above.
Typical pulse energy when using 400 µJ pump from CARBIDE/PHAROS laser. Output scales linearly in a broad range of pump parameters. For exact specifications, contact sales@lightcon.com.
I-OPA-FW-F broad-bandwidth pulses are compressed externally. For compression options, see specifications above.

Performance

Typical I-OPA-TW-HP tuning curves.
Pump: 10 W, 100 µJ, 100 kHz

Typical I-OPA-TW-ONE tuning curves.
Pump: 10 W, 100 µJ, 100 kHz

Stability

I-OPA-FW output power under harsh environmental conditions

I-OPA-FW beam direction under harsh environmental conditions

I-OPA-FW beam position under harsh environmental conditions

I-OPA with PHAROS laser

Drawing and output ports of PHAROS-PH2 with tunable I-OPA-TW-HP

Drawing and output ports of PHAROS-PH2 with fixed-wavelength I-OPA-FW-HP

PHAROS-PH1 laser with integrated I-OPA-FW

Fixed wavelength I-OPA-FW attached to PHAROS-PH1 laser

Output ports of PHAROS-PH1 with fixed wavelength I-OPA-FW

I-OPA with CARBIDE laser

CARBIDE-CB5 with tunable I-OPA-SH-TW-HP

Drawing and output ports of CARBIDE-CB3 with tunable I-OPA-TW-HP

Drawing of CARBIDE-CB3 with tunable wavelength I-OPA-SH-TW-HP

Drawing of CARBIDE‑CB5 with tunable I‑OPA‑TW

Drawing of CARBIDE‑CB5 with tunable I‑OPA‑SH‑TW‑HP

Publications

Thin-disk laser-pumped OPCPA system delivering 44 TW few-cycle pulses

M. Kretschmar, J. Tuemmler, B. Schütte, A. Hoffmann, B. Senfftleben, M. Mero, M. Sauppe, D. Rupp, M. J. J. Vrakking, I. Will et al., Optics Express 23 (28), 34574 (2020).

Datasheets

Catalogs

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Industrial-Grade Optical Parametric Amplifier I-OPA

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Industrial-grade Optical Parametric Amplifier I-OPA