β Scribed by S.V. Deshmukh; C. Rajagopalan
No coin nor oath required. For personal study only.
Multibeam CO2 lasers consist of a large number of closely packed parallel glass discharge tubes, all sharing a common plane parallel resonator. This paper describes construction and operation of a CW multibeam CO2 laser consisting 20 discharge tubes and cooled length of 1500 mm, delivering 1 kW power. A high-frequency pulser is used for producing preionization in all discharge sections for initiating the main DC discharge simultaneously in all discharge tubes. Plane parallel resonator consists of a plane ZnSe mirror of 90 mm diameter having 60% re ectivity and a gold-coated copper mirror of same diameter. This laser operates in waveguide regime and laser power is not critically sensitive to mirror misalignment.
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A laser power meter based on water as an absorbing medium has been developed to measure multi-kilowatt CO 2 laser power with high sensitivity and accuracy. Water absorbs CO 2 laser radiation readily within a very thin layer. Though water has large thermal capacity, due to short absorption length, it
Background and Objective: The CO, laser is potentially useful for the surgical treatment of superficial bladder tumors. High water absorption of the COB laser beam and the lack of a flexible fiber delivery system has hindered development of cystoscopes designed to evaporate bladder tumors. This repo