Continuity waves generation

D. Woolard, W. Zhang, E. Brown, B. Gelmont and R. Trew, An optically triggered I-RTD hybrid device for continuous-wave generation of THz oscillations. Pro. of SPIE Terahertz for Military and security Applications IV, 6212 May 5,2006. 

Boyd G T, Shen Y R and Hansch T W 1986 Continuous-wave second-harmonic generation as a surface microprobe Opt. Lett. 11 97-9... 

In the continuous wave (CW) experimental setup a sample is constantly illuminated by a probe beam and the steady state change in the transmission is detected (see Fig. 7-1). An argon ion laser has been used to generate the pump beam and the probe beam was from an incandescent lamp (tungsten or others), producing a broad spectrum (0.5 to 5 pm) [6]. Both pump and probe beams are directed onto the sample film and the transmitted probe light is collected, filtered through a monochromator, and detected by a photodetector. Both the pump and the probe... 

The RF signal at / thus generated is sent to an analog multiplier to adjust its level. The signal, so far being a continuous wave, is then gated by an RF switch to make a pulse. 

High power microwaves are generated by vacuum tubes. The magnetron and klystron are the most commonly used tubes for the generation of continuous waves power for microwave processing. Power is normally launched from the microwave tube into a transmission line or waveguide, where it travels to a load or termination such an antenna or a microwave heating applicator. 

Laser beam expansion was also employed in LPA laser detection of HO (36-39). Hubler et al. (38) calculated an asymptotic laser-generated HO concentration in their quasi-continuous-wave expanded laser beam by assuming a chemical decay lifetime of 1 s for the excess HO. Chemical recycling of this HO was assumed to be slow with respect to the residence time of air in the laser beam. 

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