MixTrain 5/10

Frequency Mixing in Periodically Poled Crystals

The MixTrain is using quasi-phase matching in periodically poled crystals for difference frequency mixing of two cw-lasers. Typically, one of the lasers will be a tunable Titanium-Sapphire laser like the Matisse while the other laser is a powerful fixed wavelength fiber laser operating at 532 nm and 1064 nm. The system uses a motor controlled translation stage for changing the period of the crystal and a temperature stabilized oven capable of heating up to 180 °C.
All optics for beam shaping, polarization control, beam combination, and beam separation are included. An optical diode isolates the fiber laser input from back reflections from the setup. The doubled fiber laser at 532 nm can be ordered with a second beam output for the residual 1064 nm. The MixTrain Optics can be used for 532 nm and 1064 nm. A shift mirror construction in the pump path allows for easy change between the two input wavelengths for the MixTrain with minimal readjustment.

Tuning Ranges

Fiber Laser 3) Matisse Range Power 1)
532 nm 690-1015 nm Difference 1160-2350 nm > 170 mW at 1350 nm
1064 nm 690-1015 nm Difference 1940-4260 nm > 100 mW at 2350 nm


Standard Crystals Scan Range 4)
PPCD2-TiS-05 Periodic Poled Crystal, 1.15-1.0 μm 40 GHz
PPCD3-TiS-05 Periodic Poled Crystal, 1.65-2.3 μm 40 GHz
PPCD2-TiS-10 Periodic Poled Crystal, 1.96-2.7 μm 60 GHz
PPCD3-TiS-10 Periodic Poled Crystal, 2.4-4.2 μm 60 GHz

Periodically Poled Crystal Characteristics

Maximum Length 40 mm
Maximum Width 33 mm
Temperature Range 20-180 °C
Rec. Size of Period Domain 1 mm x 1 mm
Beam Polarization vertical


1) Matisse pumped with 15 W, single mode fiber laser 2 W / 532 nm
2) Matisse pumped with 15 W, single mode fiber laser 12 W / 1064 nm
3) for other lasers contact Sirah
4) scan range without change of crystal temperature
5) please contact Sirah for compatibility with other pump lasers
Pump Lasers 5) Matisse Titanium-Sapphire Laser (max. 5 W output)
Single-Frequency Fiber Laser (max. 15 W output)
Ambient Conditions constant temp. in the 20-30 °C range, 80% max. rel. humidity, non condensing
Cooling required for crystal (< 20 Watt, chiller of pump laser can be used)
Laboratory vibrational isolated optical table, dust-free air (flow box)
Computer Control Windows XP / Vista / 7 / 8 / 10, USB-Port

Optical Layout


All Dimensions in mm. Specifications are subject to change without notice.

Literature & Downloads

Datasheet MixTrain 5/10