Narrow-line, 1178nm CW bismuth-doped fiber laser with 6.4W output for direct frequency doubling

Abstract

We achieved a 0.2nm linewidth output at 1178nm with powers up to 6.4W in a linear 80m Bismuth-doped fiber cavity pumped by a 55W Yb fibre laser. The potential of frequency doubling of the non-polarized output at 1178nm in MgO doped periodically poled lithium niobate was demonstrated and resulted in 125mW average power at 589nm. The approach can be extended to a linearly-polarized large mode area format with under 0.1nm linewidth capable of scaling to Watts level in the 560-620nm range.

Ultrabroad emission from a bismuth doped chalcogenide glass

“…The fact that this broad emission results from 1020 nm excitation is also important because previous reports of lasing in Bi doped glasses tend to come from long excitation wavelengths. For example, the excitation wavelengths of various Bi doped glass lasers are: 1070 nm [31], 1080 nm [32] and 1205 nm [33]. The QE at 1020 nm excitation is ~17% which compares favorably to the 11% QE reported for Bi doped alumino-silicate glass [34].…”

New Infrared Luminescence from Bi-doped Glasses

“…After the discovery of a new infrared luminescent bismuth center, several research groups started to study its applications, such as optical amplification (Fujimoto & Nakatsuka 2003;Ren, Wu et al 2007;Ren, Dong et al 2007;Ren, Qiao et al 2007;Seo, Lim et al 2007), waveguide inscription(Psaila, Thomson et al 2006), or laser oscillation (Dianov, Dvoyrin et al 2005;Dianov, Shubin et al 2007;Razdobreev, Bigot et al 2007;Rulkov, Ferin et al 2007;Truong, Bigot et al 2008) using Bi luminescent materials. With respects to device applications, optical fibers with Bi luminescent center in the core material are very curious.…”

Combined excitation-emission spectroscopy of bismuth active centers in optical fibers

“…Интерес к таким материалам связан с возможностью их использования для создания лазеров в указанном диапазоне длин волн и для усиления оптических сигналов в диапазоне 1300-1500 нм для волоконных систем связи следующего поколения. До настоящего времени лазерная генерация и оптическое усиление на волоконных световодах, легированных висмутом, получены в области длин волн 1150-1550 нм [1][2][3][4][5][6][7][8]. Серьезным препятствием на пути совершенствования висмутовых лазеров и усилителей является отсутствие адекватной модели ИК висмутового активного центра (BAC) в оптических средах.…”