Ruby laser

About: Ruby laser is a research topic. Over the lifetime, 2474 publications have been published within this topic receiving 38933 citations. The topic is also known as: corundum laser & ruby rod.

Induced focusing and defocusing of optical beams via a Raman−type nonlinearity

Abstract: Using a 5.7−MW single−mode ruby laser pulse at an intensity of 100 MW/cm2 through a 10−cm−long cell of benzene, we report the experimental observation of the induced focusing and defocusing of an externally generated Stokes probe beam on the high− and low−frequency side of the 992−cm−1 Raman line, respectively. This observation gives direct evidence of the dispersion in the real part of the nonlinear susceptibility tensor χ3 in the vicinity of a Raman mode.

Fast Fluorescence Measurements in Dyes

Abstract: Excited singlet lifetimes of ∼2 nsec for cryptocyanine and ∼6 nsec for chloroaluminum phthalocyanine have been measured directly from fluorescence. The fast excitation source is a mode‐locked ruby laser. A model is proposed to explain these and other relaxation measurements compatible with the observed fluorescent efficiencies of the dyes.

Determination of Nonlinear Refractive Indices by External Self-focusing

Abstract: The nonlinear refractive index of benzene is determined by measuring the reduction of the beam divergence of picosecond ruby laser pulses when passing through a benzene sample. Time-integrated spatial beam profiles give an effective refractive index while time-resolved beam profiles measured with a streak camera allow the determination of the temporal evolution of the nonlinear refractive index.

Methods of Generation

Abstract: It is over a decade since picosecond laser pulses were first produced by passive modelocking of a giant-pulse ruby laser by Mocker and Collins [21] in 1965 and then Nd: glass lasers by DeMaria et al [22] in 1966 Since then the techniques for the generation of these pulses have been developed to the extent that it is possible to reliably produce pulses of bandwidth-limited durations of — 1 ps from both pulsed and cw lasers In addition, theoretical models have been refined to the stage that there is excellent agreement with even the details of the experimental results, and there is now a very good understanding of the mechanisms by which ultrashort pulses evolve from the initial fluorescence intensity fluctuation patterns These substantial advances in technology and physical understanding have been largely due to the simultaneous development of the methods of picosecond chronoscopy, particularly the direct linear measurement of pulse durations by electron-optical streak cameras This pattern, of course, follows the historical pattern whereby developments in science and technology are almost always related to advances in measurement techniques As a result the methods of picosecond laser pulse generation and measurement are now sufficiently refined and catalogued for them to be used with confidence for the investigation on a picosecond timescale of the interaction of coherent light with matter