We perform noise spectroscopy of a Josephson parametric oscillator (JPO) by implementing microwave homodyne interferometric measurement scheme. observe the fluctuations in self-oscillating output field JPO for long 10-s time interval single-shot and characterize phase amplitude noise. Furthermore, we investigate effects pump strength on power spectra JPO. find strong with $1/{f}^{2}$ characteri...

The wavelength dependence of thermal lens signal from organic dyes are studied using dual beam thermal bI technique. It is found that the profile of thermal lens spectrum widely differ from the conventional absorption spectrua in the case of rhodamine B unlike in the case of crystal violet. This is explained on the basis of varying contributi<mll' nonradiative relaxations from the excited vibro...