饱和吸收
材料科学
宽带
光纤激光器
石墨烯
激光器
光电子学
光学
纤维
波长
物理
纳米技术
复合材料
作者
Harith Ahmad,F.D. Muhammad,Mohd Zamani Zulkifli,Sulaiman Wadi Harun
标识
DOI:10.1080/09500340.2013.842005
摘要
An ultra-wide wavelength tuning range, which covers three different band regions consisting of the S-, C-, and L-bands, is proposed and demonstrated for a graphene-based Q-switched erbium-doped fiber laser using a tunable bandpass filter as the wavelength tuning and filtering mechanism. A 3 m length of erbium-doped fiber is used as the gain medium in a ring laser cavity configuration, with absorption coefficients of between 11 and 13 dB m−1 at 980 nm and about 18 dB m−1 at 1550 nm. The tuning range of the Q-switching pulses covers a wide wavelength range of 58 nm, which spans from 1512.5 nm to 1570.5 nm. In addition, the lasing and Q-switching thresholds are considerably low, with respective values of ∼11.0 mW and ∼18.4 mW. A repetition rate of 55.3 kHz is obtained at the maximum pump power of 100.4 mW, together with pulse width and pulse energy of 1.6 μs and 25.8 nJ, respectively.
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