ASG. Second Harmonic Generator
| 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. |
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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).
Related products
| Input wavelength range | 750-1600 nm |
| SH output wavelength | 375-800 nm |
| TH output wavelength | 250-533 nm |
| Conversion efficiency | SH: 20-50%; TH: 3-15% |
| Input wavelength range | 820-1600 nm |
| SH output wavelength | 410-800 nm |
| FH output wavelength | 205-400 nm |
| Conversion efficiency | SH: 20-50%; FH: 3-10% |
| Input wavelength range | 780-1600 nm |
| SH output wavelength | 390-800 nm |
| TH output wavelength | 260-533 nm |
| FH output wavelength | 195-400 nm |
| Conversion efficiency | SH: 30-60%; TH: 5-10%; FH: 1-10% |
| Input wavelengths | 800, 1030 or 1240 nm |
| Maximum input pulse energy | up to 100 mJ |
| Conversion efficiency | up to 30% |
| Possible output wavelengths (for various input sources) |
870, 1050, 1180, 1200, 1430, 1890, 1530, 1970, 2600 nm |
| Tuning range | 230-4750 nm |
| Pulse duration | 130...250 fs |
| Average optical power | up to 2 W |
| Repetition rate | 80 MHz |
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