Intracavity second harmonic generation

II. Intracavity Second Harmonic Generation Using an Organic Crystal... 

We have recently conducted a set of intracavity second harmonic generation experiments using the organic nonlinear material DAN (4-(N,N-dimethylamino)-3-acetamidonitrobenzcne) and an optically pumped cw Nd YAG laser (2). Figure 3 shows the experimental setup. Quasi-cw operation was achieved with crystal samples immersed in index matching fluid in an antireflection coated cuvette that was placed internal to the Nd YAG laser cavity. 

K. M. Gheri, C. Saavedra, D. F. Walls. Intracavity second-harmonic generation using an electromagnetically induced transparency. Physical Revew A 1993 May 4 48(4) 3344-3361. 

V. Petrov, D. Georgiev, and U. Stamm, Improved Mode Locking of a Femtosecond Titanium-Doped Sapphire Laser by Intracavity Second Harmonic Generation , Appl. Phys. Lett. 60, 1550 (1992). 

Fig. 20. Schematic diagram of the Synchroscan streak camera system. A Spectra Physics model 164 acousto-optically mode-locked argon ion laser modulated at 69.44MHz pumps the Rhodamine 6G dye laser formed by mirrors Mi, M2, M3 and M4. This dye laser typically produces pulses of 2 ps duration with an energy content of 0.6 nJ. The second harmonic is generated intracavity in an ADP crystal. The UV radiation is then coupled out through mirror Ms and a filter F2 is used to eliminate any transmitted visible light before focusing into the sample cell with lens Lt. The fluorescence is detected at 90 to the incident beam. A lens L2 collects the fluorescence which passes through a polarizer and a bandpass filter and then onto the slit of the streak camera. (After ref. 69.)...

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