Picosecond Pulsed Sources
Versatile Picosecond Laser Module
- Center emission wavelength 766 nm and 1532 nm
- Pulse width typ. 70 ps (FWHM) or 0.5 ns (FWHM)
- Average output power > 1.5 W or > 400 mW
- Repetition rates from single shot up to 80 MHz, external or internal triggering
- Collimated output
free trialThe VisIR laser is a versatile and flexible platform based on a Master Oscillator Fiber Amplifier (MOFA) concept with frequency conversion. The master oscillator generates infrared picosecond pulses at 1530 nm with variable repetition rates up to 80 MHz using the proven gain-switching techniques from PicoQuant. The output of this seed laser is directly connected to a multi-stage fiber amplifier, which boosts the output from the seed laser by several dB while maintaining the other characteristics of the seed laser beam like the emission wavelength, polarization and the pulse width.
Average output power > 1.5 W
The high pulse energies of the amplified 1530 nm infrared laser permit an efficient wavelength conversion using single pass second harmonic generation (SHG). In that way it is possible to generate picosecond pulses at 766 nm with an average output power of more than 1.5 W (VisIR-765 „STED“). The VisIR can be operated at 12 different internally selectable repetition rates between 31.25 kHz and 80 MHz and can also be triggered externally by TTL or NIM signals at any repetition rate between single shot and 80 MHz. This feature is extremely useful for a perfect synchronization of excitation and depletion laser in a stimulated emission depletion (STED) set-up.
Flexible pulse duration
The laser can be configured with a short pulse of 70 ps or an extended pulse duration of 0.5 ns (FWHM).
The extended pulse duration of 0.5 ns is found to be ideal for e.g. STED microscopy since longer pulses or even continuous-wave excitation can expose the sample to an unnecessary amount of radiation that can lead to increased photobleaching.
Excellent beam quality
The VisIR features a nearly perfectly circular and gaussian shaped beam profile (TEM00) which can be specified as a value of M² < 1.1, with a typical figure of about M² ~ 1.02. That is an important parameter for further accurate beam shaping (e.g. „STED-Donut“ for the VisIR-765 „STED“).
Compact stand alone device
The VisIR is a stand alone device with a special design optimized for maximum heat dissipation. It includes all driving functions of the established PDL series laser driver such as choice of repetition rate and trigger source. An optional remote control for the VisIR allows to set the trigger source, the repetition rate, and the general output power of the laser.
|Center wavelength||766 ± 3 nm||766 ± 3 nm||1531 ± 3 nm||1531 ± 3 nm|
|Maximum average output power||> 400 mW||> 1.5 W||> 750 mW||> 1.3 W|
|Pulse width (FWHM)||typ. 70 ps||typ. 0.5 ns||typ. 70 ps||typ. 0.5 ns|
|Spectral width||<< 1 nm||<< 1 nm||<< 1 nm||<< 1 nm|
|Output||collimated beam||collimated beam||collimated beam||collimated beam|
|Beam diameter||2.2 mm ± 0.2 mm||2.2 ± 0.2 mm||0.5 ± 0.1 mm||0.5 ± 0.1 mm|
|Beam quality||M² < 1.1 (Typ. ~ 1.02), TEM00||M² < 1.1 (Typ. ~ 1.02), TEM00||M² < 1.1, TEM00||M² < 1.1, TEM00|
|PER||> 30 dB||> 30 dB||> 20 dB||> 20 dB|
|Power stability (12 hours)
(ΔT (ambient) < 0.5 K)
|< 3 % rms||< 3 % rms||< 3 % rms||< 3 % rms|
80, 40, 20, 10, 5, or 2.5 MHz (80 MHz base frequency)
1000, 500, 250, 125, 62.5, or 31.25 kHz (1 MHz base frequency)
|External via NIM input|
|Range||< 10 Hz to 80 MHz|
|Trigger level||fixed trigger level at -400 mV|
|External via TTL input|
|Range||< 10 Hz to 80 MHz|
|Amplitude||- 5 to + 5 V (maximum limits)|
|Trigger level||adjustable between -1 and +1 V|
|Amplitude||< -800 mV into 50 Ohms (NIM)|
|Trigger in (NIM) to sync out||Typ. 9 ± 1 ns|
|Trigger in (NIM) to optical out||Typ. 80 ns|
|Sync out to optical out||Typ. 70 ns|
|Size (l × w × h)||352 x 336 x 82.5 mm|
|Temperature range||10 - 30 °C|
|Maximum power consumption||115 W|
* short pulse widths below 70 ps available on demand
All Information given here is reliable to our best knowledge. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications and external appearances are subject to change without notice.
The VisIR-765 "STED" has been mainly designed to be used as a depletion laser in Stimulated Emission Depletion Microscopy (STED), but it can be used for various other applications, such as:
- Fluorescence Lifetime Imaging (FLIM)
- Phosphorescence Lifetime Imaging (PLIM)
- Fluorescence Correlation Spectroscopy (FCS)
- Fluorescence Lifetime Correlation Spectroscopy (FLCS)
- Foerster Resonance Energy Transfer (FRET)
- Pulsed Interleaved Excitation (PIE)
- Fluorescence Anisotropy (Polarization)
- Time-Resolved Photoluminescence (TRPL)
- TRPL Imaging