نتایج جستجو برای: holmium
تعداد نتایج: 1440 فیلتر نتایج به سال:
We report the design and performance of medium slope efficiency (64%) Holmium-doped fiber amplifiers (HDFAs) with novel alternative in-band pump wavelengths in 1720-2000 nm spectral region. demonstrate through simulations that 1840-1860 can yield significantly improved output power, gain, optical-optical conversion compared to previous technical industry standard wavelength 1940 nm. Our are ver...
INTRODUCTION The rapid development and invention of ever more technologically advanced ureterorenoscopes as well as other instruments used in fragmenting ureteral stones have made the traditional surgical treatment of ureterolithiasis very rare. MATERIAL AND METHODS We investigated 727 patients treated for ureterolithiasis. 769 ureteroscopic lithotripsies (URSL) with the holmium laser were pe...
We investigate the operation of holmium-doped fibre amplifiers (HDFAs) in the 2.1 µm spectral region. For the first time we demonstrate a diode-pumped HDFA. This amplifier provides a peak gain of 25 dB at 2040 nm with a 15 dB gain window spanning the wavelength range 2030 - 2100 nm with an external noise figure (NF) of 4-6 dB. We also compare the operation of HDFAs when pumped at 1950 nm and 20...
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