Diode-pumped crystals provided recently new compact laser devices. We report the first end pumping of a La Ndl-xMgAEl,Ol,(LNA) crystal using a 200mW diode array (Spectra Diode Lab). We also rgport the first results obtained with a ImW diode (SONY). This C.W. laser can be tuned from 1.048~ to 1.086pm. Without selective elements in the cavity, the laser emits around 1.054pm with a threshold of 24...

Introduction The development of laser diodes has increased the variety of practical applications for lasers as light sources in analytical spectroscopy. Lasers are excellent radiation sources due to their monochromaticity, good beam focusing capabilities, and small line-widths but have traditionally been expensive and difficult to operate, limiting their applications to specialized fields. Beca...

The 2.1-/im 5I7-518 laser transition in Ho3+ is attractive because of its long upper laser level lifetime, of the order of 5 msec, and its eye-safe wavelength. However, this laser typically is cooled to liquid-N2 temperatures to achieve continuous-wave (cw) or high-repetition-rate operation because its lower laser level is in the ground-state manifold, a few hundred inverse centimeters above th...

High power diode lasers have found increased applications in pumping of solid state or fiber laser systems for industrial, military and medical applications as well as direct material processing applications. The non-linearity of the near-field of emitters (or the so called “smile” effect) in a laser diode array poses significant challenges in optical coupling and beam shaping and has become on...

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Wavelet analyses of tunable diode laser absorption spectroscopy signals were performed. The absorption spectroscopy data were obtained by repeatedly scanning the beams from a tunable diode laser operating in the near infrared across absorption lines of gaseous NH(3) contained within a windowed glass tube. The laser was modulated and wavelet analyses of the absorption data were performed. It was...

It has been well established that laser treatment for type 1 prethreshold retinopathy of prematurity is effective in approximately 90 percent of treated eyes, avoiding retinal detachment.1 Transpupillary laser therapy is certainly the standard; however, there are circumstances in which transpupillary treatment may be difficult or impossible to perform thus allowing progression of retinopathy of...

We report on a method for characterizing the tuning capabilities of small-bandwidth external-cavity diode lasers. The step response of a piezo-driven Littman-Metcalf external-cavity diode laser and the compensation of its optoelectromechanical frequency response is investigated. When an approximately 50-V compensated Gaussian pulse is applied to the piezo element, a detuning of 13.6 GHz is obse...

Among possible monitoring techniques, self-mixing interferometry stands out as an appealing option for online ablation depth measurements. The method uses a simple laser diode and interference is detected inside the diode cavity and measured as the optical power fluctuation by the photodiode encased in the laser diode itself. This way, self-mixing interferometry combines the advantages of a hig...