Fig. 1. (a) Experimental setup of the proposed AOM. (b) Its magnified side-view.

Fig. 2. Microscopic images of the etched optical fiber.

Fig. 3. (a) Measured modulation depth as a function of the electrical frequency at the wavelength of 1560 nm. (b) Measured oscilloscope traces of the applied electrical signal to the prepared AOM and the output optical signal.

Fig. 4. Measured modulation depth as a function of the input-beam wavelength when the frequency and the peak-to-peak amplitude of the electrical signal, which was applied to the PZT, were fixed at 918.9 kHz and 10 V, respectively.

Fig. 5. Measured modulation depth as a function of the peak-to-peak amplitude of the electrical signal applied to the PZT. Both the electrical signal frequency and the wavelength of the input laser beam were fixed at 918.9 kHz and 1560 nm, respectively.

Fig. 6. Experimental schematic of the mode-locked fiber laser for which the prepared AOM was incorporated.

Fig. 7. (a) Measured oscilloscope trace of the output pulses. (b) Measured optical spectrum of the output pulses at a pump power of 108 mW. Inset shows a measured optical spectrum of the output pulses when the electrical signal was off. These measurements were conducted with a pump power of 108 mW.

Fig. 8. (a) Measured autocorrelation trace of the output pulses. (b) Measured electrical spectrum of the output pulses. Inset shows a wide-span electrical spectrum. These measurements were conducted with a pump power of 108 mW.

Fig. 9. Measured temporal width and peak power of the output pulses as a function of the pump power.