Spectra-Physics’ ® UHG® series is a user-friendly Harmonic generation module capable of second, third, and fourth harmonic generation for ultrafast oscillators and options for pulse selection. The UHG series provides high-efficiency harmonic generation of femtosecond and picosecond oscillators such as the Spectra-Physics InSight®, Mai Tai® and Tsunami®.
Second Harmonic Generation | Fundamental | SHG |
---|---|---|
Input Wavelength | 680-1300 nm | |
Output Wavelength | 680-1300 nm | 340-650 nm |
Conversion Efficiency (@ 900 nm, 80 MHz) | 40% | |
Power with InSight X3+/X32 | 3000/2000 mW | 1200/800 mW |
Pulse Selection | Fundamental | SHG |
---|---|---|
Wavelength | 680-1100 nm | 340-650 nm |
Diffraction Efficiency (@ 900 nm, 8 MHz) | 35% | |
Power with InSight X3+/X32 | 107/71 mW | 15/10 mW |
Footnotes:
Femtosecond Operation | SHG | SHG (in THG)2 | THG | FHG |
---|---|---|---|---|
Input Wavelength | 680-1080 nm | 836-968 nm | ||
Output Wavelength | 340-540 nm | 226-360 nm | 209-242 nm | |
Conversion Efficiency3 | 40% | 25% | 10% | 4% |
Power with Mai Tai HP4 | 1000 mW | 625 mW | 250 mW | 80 mW |
Power with Tsunami HP5 | 1080 mW | 675 mW | 270 mW | 100 mW |
Picosecond Operation | SHG | SHG (in THG)2 | THG | FHG |
---|---|---|---|---|
Input Wavelength | 680-1080 nm | 836-968 nm | ||
Output Wavelength | 340-540 nm | 226-360 nm | 209-242 nm | |
Conversion Efficiency3 | 15% | 10% | 4% | 0.1% |
Power with Tsunami HP5,7 | 435 mW | 290 mW | 87 mW | 2.5 mW |
Pico HE Option | 25% | 20% | 12% | 1% |
Pico HE option with Tsunami HP5,7 | 725 mW | 580 mW | 348 mW | 25 mW |
Input Wavelength | 680-1080 nm | ||
Diffraction Efficiency8, 10 | 40% | ||
Power with Mai Tai HP4, 10 | 100 mW | ||
Power with Tsunami HP5, 10 | 108 mW | ||
Contrast Ratio8, 9 | 300:1 | ||
Repetition Rate | Adjustable: 40 MHz to single shot |
Femtosecond Operation | SHG | SHG (in THG)2 | THG |
---|---|---|---|
Output Wavelength | 340-540 nm | 226-360 nm | |
Conversion Efficiency3,6 | 10% | 8% | 5% |
Power with Mai Tai HP4 | 8.5 mW | 7 mW | 4 mW |
Power with Tsunami HP5 | 9.5 mW | 7.5 mW | 4.5 mW |
Picosecond Operation | SHG | SHG (in THG)2 | THG |
Output Wavelength | 340-540 nm | 226-360 nm | |
Conversion Efficiency3,6 | 3% | 2.5% | 1% |
Power with Tsunami HP7 | 3 mW | 2.5 mW | 1 mW |
Footnotes:
The UHG Series for InSight provides virtually gap free tuning from 340 nm to 1300 nm when combined with the fundamental output. It provides high efficiency SHG (second harmonic) output that exceeds 40% efficiency and when combined with the InSight X3™, providing an average power of >800 mW at 450 nm. In addition, the new UHG Series for InSight is fully automated and allows for software control to tune both the fundamental and second harmonic wavelengths. Pulse selection is available from 340 nm to 1100 nm at repetition rates of single shot to 40 MHz. Pulse selector can run in high contrast ratio mode, or high efficiency mode depending on the needs of the experiment.
The UHG Series for Mai Tai and Tsunami has been designed to handle greater than 4 W of average power and deliver efficiencies exceeding 40% for SHG. The pulse selector option inside the UHG head offers a SiO2 Bragg cell for the highest output powers and contrast ratio. The system is capable of pulse selecting from single shot to 40 MHz and is positioned before all harmonic stages to offer the most features in a single compact housing. The UHG series is a flexible system suitable for a variety of scientific applications requiring access to a wide spectrum of femtosecond or picosecond laser pulses.
To verify and analyze the output power of yourUHG laser, we recommend the Ophir 3A-PF-12 (7Z02720) thermal power sensor and Centauri laser power meter. Additional information on this laser measurement equipment can be found on the ophiropt.com website. Other Ophir sensors and meters may also be suitable for the UHG, depending on application. Ophir also works with laser system developers to achieve embedded beam diagnostics to monitor system performance as an OEM solution.