Abstract

For a linearly variable Fabry–Perot filter, the peak transmission wavelengths change linearly with the transverse position shift of the substrate. Such a Fabry–Perot filter is designed and fabricated and used as an output coupler of a c-cut $\mathrm{Nd}\text{:}{\mathrm{YVO}}_4$ laser experimentally in this paper to obtain a 1062 and 1083 nm dual-wavelength laser. The peak transmission wavelengths are gradually shifted from 1040.8 to 1070.8 nm. The peak transmission wavelength of the Fabry–Perot filter used as the output coupler for the dual-wavelength laser is 1068 nm and resides between 1062 and 1083 nm, which makes the transmissions of the desired dual wavelengths change in opposite slopes with the transverse shift of the filter. Consequently, powers of the two wavelengths change in opposite directions. A branch power, oppositely tunable 1062 and 1083 nm dual-wavelength laser is successfully demonstrated. Design principles of the linear variable Fabry–Perot filter used as an output coupler are discussed. Advantages of the method are summarized.

© 2016 Optical Society of America

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