Transient processes manifested in the emission spectra of cw wide-band dye lasers used for intracavity laser spectroscopy

Continuous wave intracavity dye laser absorption with an inductively coupled plasma

“…Recently, it was demonstrated (2) that lasing can be sustained with an inductively coupled plasma (ICP) operating within the cavity of an extended cavity flashlamp pumped dye laser. The analytical results obtained with this pulsed laser system were consistent with simplified theory (3)(4)(5)(6)(7)(8) of intracavity absorption with narrow-band absorbers.…”

“…In Table VII, the concentration of water in tuna fish by the oxygen emission measurement technique is lower than the weight loss measurement technique value. The weight loss technique value, in this case, included loss of organic volatiles (7,8). The resulting volatile organic substances decompose and produce carbon species in the plasma resulting in a lowering of the O-emission signal producing the low results.…”

Dynamics of laser intracavity absorption

“…With I being the intensity of the absorbed mode, Io the intensity in the absorption-free case, and tt the absorption coefficient in cm, the modified absorption law is given by y(t) =I (for 0&t &t, d, ) . (6) sensitivity of intracavity absorption. The natural logarithm of (I/Io) equals the effective optical depth tt;ctl/L of the absorber system.…”

“…This second modulator was triggered by the first one with a certain time delay. The signal transmitted by the delayed modulator then provides the actual spectrum of the dye laser as it has evolved until Convincing evidence against the hypothesis of a steady state in a cw multimode laser system was presented by Baev et al ' in 1980. They observed that the individual axial modes of a cw dye laser have a finite lifetime.…”

“…Furthermore, the spectral width AA, of the laser emission narrows for an increasing pump-pulse duration in agreement with Eq. (6).…”