The PicoEmerald Three-Channel Tunable Picosecond Laser System is an easy-to-use and truly hands-free light source from APE. Ideal for SRS and CARS, offering three temporally and spatially overlapped picosecond pulse trains to cover the full fingerprint region and beyond.
With the PicoEmerald, all 3 beams (Signal, Idler and IR pump) are designed to come from one and the same output. They are perfectly overlapping in space and time. Therefore, there is no need for the user to use additional optics to guide the different beams into one location.
Users often want to use the entire wavelength range provided by the IR beam and the Signal and Idler output. Some applications, such as Coherent Raman Spectroscopy, even require the different beams being spatially and temporally overlapped. The difficulty with most laser systems is that IR, Signal and Idler beam come from different outputs. The different beams can therefore not easily be coupled into one and the same experiment. With the common single output port of the picoEmerald, the user has the certainty and comfort of not having to create their own beam path for the individual beams.
The picoEmerald has an integrated delay management (GDD dispersion compensated output). This allows the perfect adjustment of the time delay between the IR and the Signal beam even for external optics, in order to deal with dispersion differences at the different wavelengths. Each time the picoEmerald picosecond laser is tuned to a new Signal wavelength the delay of the IR beam is adjusted automatically for achieving a temporal overlap between Signal and IR pulse either at the output port or at an external experiment position
| Wavelength 1 (Stokes | 1032 nm ± 1.5 nm |
| Wavelength 2 (Pump – Signal) | 700 nm … 990 nm |
| Wavelength 3 (Idler) | 1080 nm … 1950 nm |
| Power 1 (Stokes) | >700 mW unmodulated |
| Power 2 (Pump – Signal) | >700 mW at 800 nm |
| Power 3 (Idler) | >400 mW at 1250 nm |
| ∆v Pump – Stokes | 400 cm-1 … 4500 cm-1 |
| ∆v Pump – Idler | 800 cm-1 … 9000 cm-1 |
| Spectral bandwidth | ~10 cm-1 (Pump – Signal and Stokes) |
| Pulse width | ~2 ps (Pump – Signal and Stokes) |
| Repetition rate | 80 MHz ± 0.5 MHz |
| Noise | Shot noise limited (-161 dBc/Hz) >10 MHz for Pump – Signal |
| Beam Parameters | |
|---|---|
| Pointing stability | <100 µrad per 100 nm (typical 100 µrad over entire range) |
| M2 | <1.2 for Pump – Signal, typical 1.2 for Stokes |
| Ellipticity | <20 % |
| Polarization | Linear, horizontal >100:1 |
| Beam divergence | 1.0 mrad ± 0.2 mrad at 800 nm and Stokes |
| Beam waist diameter | 1.2 mm ± 0.2 mm at 800 nm, 1.7 mm ± 0.2 mm for Stokes |
| Features: | |
| Software configurable output modes | 1. Signal and 1032 nm, or 2. Signal and Idler, or 3. Signal, Idler and 1032 nm respectively with overlap in space and time |
| Wavelength measurement | Integrated spectrometer for Pump – Signal wavelength |
| Power attenuators | Integrated for Pump – Signal and Stokes, independent for each beam |
| Wavelength sweep function | Start/End function, user-defined holding time, trigger function Max. step size: 2 nm Tuning speed: ~5 s per wavelength step |
| Remote control | Possible via USB, Ethernet TCP/IP or RS232 |
| Options: | |
| SRS modulator | EOM with resonant fixed modulation frequency of 20 MHz Built-in and controllable with the same software 1032 nm beam modualted power: 300 mW |
| High power for 1032 nm beam | 2 W (unmodulated), 1 W (modulated) |
| Long pulse / Narrow-bandwidth option | ~4.5 ps / ~5 cm-1 Pump – Signal ~6.5 ps / ~10 cm-1 Stokes |
| Additional IR output port | Additional 1032 nm beam output for pumping another OPO (Levante IR ps) Wavelength: 1032 nm ± 1.5 nm Power: >4 W Spectral bandwidth: ~10 cm-1 Pulse width: ~2 ps (~6.5 ps optional) Repetition rate: 80 MHz ± 0.5 MHz |
Stimulated Raman spectroscopy (SRS)
Coherent anti-Stokes Raman spectroscopy (CARS)
SRS microscopy of vibrational probes
Second harmonics imaging (SHG)
Pump-probe spectroscopy
Surface enhanced Raman spectroscopy (SERS)
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Photonic Solutions Ltd
Unit 2.2 Quantum Court
Heriot-Watt University Research Park
Edinburgh
EH14 4AP
