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TOPAS | PRIME-HE

High Energy Optical Parametric Amplifier

TOPAS-PRIME-HE is a high-energy femtosecond optical parametric amplifier (OPA) based on TOPAS-PRIME, featuring an additional high-energy and low-dispersion amplification stage, which allows using pump pulse energy of up to 60 mJ while maintaining the shortest possible pulses at the output.

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Light Conversion | TOPAS | PRIME-HE

The standard TOPAS-PRIME-HE high-energy OPA model accepts pump pulse energy of up to 15 mJ @ 35 – 70 fs (up to 27 mJ @ 100 – 200 fs), while TOPAS-PRIME-HE-PLUS accepts higher pump pulse energy, up to 35 mJ @ 35 – 70 fs (up to 60 mJ @ 100 – 200 fs). The pump pulse energy of 60 mJ is possible with longer pulses, ca. 150 fs. Both models come with wavelength extension options, covering the wavelength range from 189 nm to 20 μm for TOPAS-PRIME-HE and 240 nm to 20 μm for TOPAS-PRIME-HE-PLUS.

Features :

189 nm – 20 ?m tuning range
Up to 6 mJ pump pulse energy
> 25% conversion efficiency
High output stability
CEP stabilization of Idler
Fresh pump channel for improved temporal and spatial properties of sum-frequency options

Specification Notes :

TOPAS-PRIME-HE and TOPAS-PRIME-HE-PLUS specifications are given for the following pump laser parameters:

800 nm wavelength
6 mJ pulse energy (Ultra-Fast (20 - 70 fs))
10 mJ pulse energy (Fast (70 - 200 fs))
1 kHz repetition rate
30 – 40 fs pulse duration (Ultra-Fast (20 - 70 fs))
100 – 150 fs pulse duration (Fast (70 - 200 fs))
Gaussian beam

Note 1: Specifications depend on pump wavelength and pulse duration. If they differ from the values above, contact sales@lightcon.com.

Note 2: TOPAS-PRIME-HE output pulse energy scales linearly in 3 – 20 mJ range, provided the device is installed and optimized for particular pump energy. The device has to be re-optimized if the pump energy changes more than 10% from the installation value.

ULTRA-FAST (20-70 fs) & FAST (70-200 fs) Pump Laser Requirements :

Model	TOPAS-PRIME‑HE		TOPAS‑PRIME-HE‑PLUS
Pump wavelength	770 – 830 nm
Pump pulse duration (FWHM)
ULTRA-FAST (20-70 fs)	20 – 35 fs	35 – 70 fs	20 – 35 fs	35 – 70 fs
FAST (70-200 fs)	70 – 100 fs	100 – 200 fs	70 – 100 fs	100 – 200 fs
Pump pulse energy
ULTRA-FAST (20-70 fs)	2 – 8 mJ	2 – 15 mJ	2 – 18 mJ	2 – 35 mJ
FAST (70-200 fs)	2 – 20 mJ	2 – 27 mJ	2 – 47 mJ	2 – 60 mJ
Repetition rate	< 25 kHz *(1)
Maximum pump power	40 W *(2)
Pump polarization	Horizontal
Spectral bandwidth	< 1.2× transform limit
Pulse-to-pulse energy stability	< 1% RMS deviation *(3)
Pulse duration stability	< 1% pulse-to-pulse *(4)
Pulse front tilt	< 10% of pulse duration
Pulse contrast	< 1 : 20
Beam quality (M²)	< 1.3 *(5)
Beam astigmatism	< 0.15 *(6)
Beam spatial profile	Gaussian – Super Gaussian
Intensity modulation	< 15%, no hotspots *(7)
Beam pointing stability	< 10 μrad *(8)
Beam divergence	< 1.2× diffraction limit
Beam height from optical table	125 – 185 mm
Beam diameter (1/e²)	< 19 mm (9) (10)

*Maximum repetition rate for DFG1 (NDFG1) option is 1 kHz.
*Higher pump power options available.
*Normalized to average pulse energy, NRMSD.
*Normalized to average pulse duration, NRMSD.
*M2 specification valid for Gaussian beam.
*Normalized astigmatism – difference of the waist positions, divided by Rayleigh length.
*Normalized to Gaussian or Super-Gaussian fits, NRMSD.
*NRMSD, full angle.
*Optional external telescope can be ordered for the beam size < 39 mm, 1/e2 (69 mm clear aperture mirrors).
*Limitation on minimal beam diameter applies. Minimal beam diameter depends on pulse duration and energy.

Brochures & Datasheets :

TOPAS Optical Parametric Amplifiers for Ti:Sapphire Lasers (pdf / English)