Acta Optica Sinica, Volume. 26, Issue 10, 1453(2006)
Tunable Wavelength Converters of Picosecond Pulses Based on Periodically Poled LiNbO3Waveguides
A tunable wavelength conversion between picosecond pulses is experimentally demonstrated by using the cascaded sum and difference-frequency generation (cSFG/DFG) in a periodically poled LiNbO3 (PPLN) waveguide. The pulsed signal with 40 GHz repetition rate and 1.57 ps pulse width is adopted. When the input signal and the first control wavelengths are kept at 1554.2 nm and 1532.5 nm, respectively, the output signal wavelength can be tuned from 1536.0 nm to 1545.2 nm as the second control wavelength is varied from 1550.5 nm to 1541.0 nm. By varying the first control wavelength to satisfy the quasiphase matching (QPM) condition for the sumfrequency generation (SFG), and simultaneously adjusting the second control wavelength, the tunable output signal wavelength can be also obtained when the input signal wavelength is changed. In the experiment, the amplified spontaneous emission (ASE) noise from the erbium-doped fiber amplifier (EDFA) is effectively suppressed by employing two narrow band tunable filters. Therefore, the wavelength down and upconversions are simultaneously observed.
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[in Chinese], [in Chinese], [in Chinese]. Tunable Wavelength Converters of Picosecond Pulses Based on Periodically Poled LiNbO3Waveguides[J]. Acta Optica Sinica, 2006, 26(10): 1453