TOPAS-SHBC-400 Narrow-Bandwidth OPA

Narrow-Bandwidth Optical Parametric Amplifier

Femtosecond pulse conversion to < 20 cm^‑1 spectral bandwidth
240 nm – 2.4 μm tuning range
Up to 5 mJ pump pulse energy
High output stability

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TOPAS-SHBC-400 narrow-bandwidth optical parametric amplifier (OPA) that combines a second harmonic bandwidth compressor (SHBC) and an OPA to generate tunable pulses. When pumped by femtosecond pulses with a spectral bandwidth of 150 – 500 cm^‑1, it produces output pulses with a spectral bandwidth of 3 – 20 cm^‑1 s.

Designed for pumping by the fundamental harmonic of a femtosecond Ti:Sapphire laser, TOPAS-SHBC-400 covers a wavelength range of 480 – 2400 nm. Optional frequency mixers extend the tuning range down to 240 nm.

Specifications

Specifications notes

TOPAS-SHBC-400 specifications are given for the following SHBC output parameters:

Wavelength: 400 nm
Pulse energy: 0.5 mJ

Note 1: Specifications depend on SHBC output wavelength. If it differs from the value above, contact sales@lightcon.com.

Note 2: TOPAS-SHBC-400 output pulse energy scales linearly in 0.5 – 2 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.

Pump laser requirements


Model	TOPAS-SHBC-400
Pump wavelength	770 – 830 nm
Pump pulse duration (FWHM)	20 – 200 fs
Pump pulse energy	0.3 – 5 mJ
Repetition rate	< 25 kHz
Maximum pump power	25 W ¹⁾
Polarization	Linear, horizontal
Spectral bandwidth	< 1.2 × transform limit
Pulse-to-pulse energy stability	< 1 % RMS deviation ²⁾
Pulse duration stability	< 1 % pulse-to-pulse ³⁾
Pulse front tilt	< 10% of pulse duration
Pulse contrast	< 1 : 20
Beam quality, M²	< 1.3 ⁴⁾
Beam astigmatism	< 0.15 ⁵⁾
Beam spatial profile	Gaussian – Super Gaussian
Intensity modulation	< 15%, no hotspots ⁶⁾
Beam pointing stability	< 10 μrad ⁷⁾
Beam divergence	< 1.2 × diffraction limit
Beam height from optical table	125 – 185 mm
Beam diameter, 1/e²	< 8 mm ⁸⁾


Model	TOPAS-SHBC-400

Contact sales@lightcon.com for higher pump power options.
Normalized to average pulse energy. Expressed as normalized root mean squared deviation NRMSD.
Normalized to average pulse duration. Expressed as 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. Expressed as NRMSD.
Expressed as NRMSD, full angle.
An optional external telescope can be ordered for a beam size of 8 – 28 mm.

SHBC output


Model	SHBC
Output wavelength	385 – 415 nm
Conversion efficiency	25% (20 – 70 fs), 35% (70 – 200 fs)
Spectral bandwidth	< 10 cm^‑1
Time-bandwidth product	< 1.2
Polarization	Horizontal
Pulse-to-pulse energy stability	< 3% RMS deviation ¹⁾


Model	SHBC

Normalized to average pulse energy. Expressed as NRMSD.

TOPAS-SHBC-400 output


Model	TOPAS-SHBC-400
Tuning range	480 – 800 nm (Signal) ¹⁾800 – 2400 nm (Idler)
Conversion efficiency at peak (Signal and Idler combined)	> 20% ²⁾
Spectral bandwidth	< 20 cm^‑1 @ 500 – 730 nm, 870 – 2400 nm
Time-bandwidth product	< 1.2
Polarization	Vertical (Signal) Horizontal (Idler)
Pulse-to-pulse energy stability	< 6% RMS deviation ³⁾ @ 500 – 700 nm, 900 – 2000 nm


Model	TOPAS-SHBC-400

Some energy and spectrum modulation is possible within the 730 – 870 nm range.
Assuming a 0.5 mJ, 400 nm pump from SHBC, with a peak conversion efficiency of > 20%.
Normalized to average pulse energy. Expressed as NRMSD.

UV extensions (240 – 480 nm)


Extension	SHS	SHI
Tuning range	240 – 400 nm	400 – 480 nm
Conversion efficiency at peak	> 4% ¹⁾	> 3% ¹⁾
Spectral bandwidth	< 20 cm^‑1	< 20 cm^‑1
Spectral bandwidth	< 20 cm^‑1
Polarization	Horizontal	Vertical


Extension	SHS	SHI

Assuming a 0.5 mJ, 400 nm pump from SHBC.

DFG extensions (2400 – 10000 nm)


Extension	DFG1	DFG2
Tuning range	2.4 – 5 μm	4.7 – 10 μm
Conversion efficiency at peak	> 0.4% ¹⁾	> 0.1% ¹⁾
Polarization	Vertical	Horizontal


Extension	DFG1	DFG2

Assuming a 0.5 mJ, 400 nm pump from SHBC.

Publications

TOPAS-SHBC-400

A tunable femtosecond stimulated Raman scattering system based on spectrally narrowed second harmonic generation

K. Redeckas, V. Voiciuk, and M. Vengris

Lithuanian Journal of Physics • 2016

TOPAS-SHBC-400

Structural Heterogeneity in the Localized Excited States of Poly(3-hexylthiophene)

W. Yu, T. J. Magnanelli, J. Zhou, and A. E. Bragg

The Journal of Physical Chemistry B • 2016

Downloads

Datasheets

TOPAS Optical Parametric Amplifiers for Ti:Sapphire Lasers

Product datasheet

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Catalogs

Wavelength-Tunable Sources

Product catalog

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Femtosecond Laser Systems for Industry & Science

Product catalog

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飞秒激光器飞秒科研系统

Product catalog in Chinese

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