Abstract
In this linear-cavity passively mode-locked laser based on semiconductor saturable
absorber mirror, an Ybdoped fiber is shared by two branch cavities as gain medium. These two
cavities can respectively output single-wavelength pulse with the wavelength tuning range of 1
009.7-1 057.6 nm and 1 011.6-1 052.6 nm by adjusting volume Bragg grating. When two cavities output
pulses together, the dual-wavelength pulses with the maximum and minimum wavelength separation of
34.8 and 2.4 nm, respectively, are achieved by net gain equalization method to suppress mode
competition at room temperature. The maximum pulse energies of dual-wavelength pulses are 0.47 and
0.33 nJ separately; their repetition rates are 11.39 and 11.41 MHz.
© 2012 Chinese Optics Letters
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