Picosecond Terawatt CO2 Laser (PTL).

 
  1. Product description:   
Initial 10-μm pulse with the 2-150 ps tunable duration is chopped from the output of compact TEA CO2 laser by means of traditional switching technique: reflectivity/transmission of Ge or Si wafers are controlled by absorption of 2-ps, 1.053-μm laser pulse. The pulse power value can be further increased up to ~1 TW (for 2-ps pulse) by regenerative amplification in 10-atm TE CO2 laser.
Product parameters 
Laser radiation wavelength 10.27 μm
Laser energy up to 10 J
Radiation temporal structure train of picosecond pulses
One pulse duration 2 - 150 ps
Interpulse separation 9.3 ns
Peak power up to 1 TW 
Rep. rate  monopulse regime (1 pulse/min)
  Product composition 

1) Master (10.27 μm, 150 ns, 5 mJ, TEMoo) TEA CO2 laser.

2) Solid state (1.053 μm, 2 ps, 1 mJ, TEMoo) laser system. 

3) Picosecond 10-μm pulse forming system.

4) 10-atm X-ray preionized 5x5x55 cm3 discharge volume TE CO2 laser.

10-atm TE CO2 laserMaster TEA CO2 laser

2. Scientific and Technical Background

CO2 laser system generating a train of ~200-ps pulses with total energy up to 5 J and peak power ~4 GW was put in operation in 1997. The X-ray preionized, 5x5x55 cm3 discharge volume, 6 atm TE CO2 laser was used in this system. In 1999 the preionization system was upgraded and in 2001 the special discharge chamber body was applied. As a result stable self-sustained discharge was obtained at 10 atm CO2:N2:He mixture with molecular gases percentage 15% and specific energy input 60 J/(l*atm). At that a value of laser radiation energy approached 10 J.  After the upgrade of master CO2 oscillator towards 2-ps pulse duration the laser system will be capable to generate 10-µm picosecond pulse train with peak power up to 1 TW. 
3. Possible Applications of the Product
3.1. Laser acceleration of electrons in vacuim. The interaction of terawatt picosecond 10-µm laser pulse with traditionally pre-accelerated e-beam (say, photo cathode RF gun+LINAC) can provide acceleration gradients over 1 Gev/m substantially higher than in modern accelerators (less than 100 Mev/m). Therefore, with PTL, it will become possible to construct more compact and low-cost accelerators.

3.2. Generation of hard x-ray photons, high currents and EM fields in laser plasma. 

3.3. A pulsed radiation power of ~ 1 W was reached for the first time, with the aid of a ZnGeP2 crystal, at the difference frequency of two CO2 lasers radiation with 100-ns pulse duration in the submillimeter range (102-110 µm). Half-cycle pulse generation of terahertz bandwidth ( λ ~ 800 µm ) is capable if to irradiate the nonlinear crystal by two infrared high power pulses with duration ~ 1 ps.

3.4. Parametric generation of submillimetric high power radiation pulse with nonlinear crystal pumped by the train of 10-µm pulses. As a bye-product of parametric generator scheme an infrared wavelength tunable laser radiation can be produced. The tuning range of this radiation depends on the nonlinear crystal type (GaSe or ZnGeP2).  In particular 10.27-µm pump radiation with the infrared tunable one can be used in plasma beat-wave accelaration scheme. 


4. Promotion

Publications in Proceedings of Int. Conf. on "Lasers'96 ", "Lasers'97", "Lasers'98", Int. Conf. on "High-Power Laser Ablation" (April 1998), Advanced High Power Laser Conf. (1999), XII, XIII and XIV Gas Flow and Chemical Lasers Conf. (1998, 2000, 2002).


5. Competitiveness

The parameters of the product in their aggregation are unique. There is only one analogue laser system in operation now.  Picosecond terawatt CO2 laser of UCLA generates ~1-TW 10-µm monopulse with duration 40-200 ps (April 2001). 
 


[Home] [AboutUs] [R & D] [Lasers etc] [AboutHead] [Publications] [Partners] [PressReleases] [ContactUs]

[Product Index] [Top]