ASG. Second Harmonic Generator
• High conversion efficiency
• Small walk-off angle
• Low beam divergence
• No heating
Product overview
Second harmonic generators (SHG) are used for doubling of optical frequency for a wide range of input wavelengths produced by various ultrafast laser sources. The sources may be titanium-sapphire femtosecond lasers (Ti:S, 700-1000 nm), various ultrafast solid-state and fiber lasers around 1030-1064 nm region, chromium-forsterite oscillators (Cr:F, 1230-1270 nm), as well as other ultra-short pulse sources including parametric light conversion systems. The principle of operation is based on second harmonic generation in a non-linear crystal with phase-matching technique. The units provide stable output radiation with good beam quality and little pulse broadening in fs scale.
The models are subdivided into two main branches: the ASG-O-W for usage with ultrafast oscillators (multi-MHz rep. rates with nJ-level output) and the ASG-A-W with increased input aperture and modified layout for usage with amplifier systems (single-shot to several MHz, uJ- and mJ-level output). The “W” in the model name takes on the exact central wavelength value for a certain model, e.g. the ASG-O-800 (i.e. designed for an oscillator with ~800 nm output).
ASG-O
(for oscillators)
ASG-A
(for amplifiers)
Possible input wavelength range*
720-1600 nm
Input wavelength tuning range**
50-100 nm
Output wavelength***
360-800 nm
Input pulse duration
>20 fs
Input polarization
linear, horizontal
Output polarization
linear, vertical
Input average power
0.1-3 W
<10 W
Input pulse energy
<2 uJ
2 uJ - 10 mJ
Input beam dia at level of 1/е^2
<2 mm
<10 mm
Conversion efficiency****
20-50%
30-50%
Pulse broadening
<100 fs
Dimensions
280x140x190 mm
* - may be covered by several exchangeable optics sets, please indicate the desired wavelength range upon your request;
** - typical with one optics set, depends on exact central wavelength and pulse duration;
*** - defined by input wavelength;
**** - defined by input pulse energy and input pulse duration.
商品属性 [input wavelength] 720-1600 nm [Input pulse duration] >20 fs [Input average power] 0.1-3 W [Input pulse energy] <2 uJ