We report on the fiber-based amplification of a commercially packaged, fiber-pigtailed-pulsed diode laser operating at
wavelength of 1064nm (bandwidth 0.45nm). The cascaded Yb-doped fiber amplifier can operate safely by using
cascaded Wavelength division multiplexing (WDM) in each single-mode amplification stage. The total isolation of
cascaded WDM can protect the laser diodes from destroyed by feedback of optical power. At repetition rate of 50kHz,
pulse duration of 20ns, and average power of 0.5mW, output power up to 1.05W And peak power up to 1.05kW are
obtained, with a high signal to noise ratio of 20dB. The whole system is a good choice for a preamplifier of high-power
short-pulse amplification. The aim of the experiment is to study the design of preamplifier for high-power short-pulse
amplifier via cascaded fiber-based amplifier.
In this paper, multiwavelength erbium-doped fiber laser (EDFL) by use of fiber Bragg gratings (FBGs) with different tilt
angles in single mode fibers (SMFs) is demonstrated. The offset spliced FBGs are employed as lasing wavelength
selectors. FBGs with 2° and 8° tilt angles can produce dual- and multi-wavelength oscillations, respectively. A nonlinear
optical loop mirror is incorporated in the laser cavity to stabilize the multiwavelength oscillation at room temperature.
The difference in coupling characteristics when offset launched between tilted FBGs in SMFs and uniform/tilted FBGs in
multimode fibers are discussed.
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