▎ 摘　　要

NOVELTY - The oscillator has an amplifier (11) formed by an amplifying stage based on fiber doped with rare earths, where the stage comprises a fiber doped with rare earths pumped by a pumping source such that the fiber and the pumping source are connected to each other through a wavelength division multiplexer (15). A parametric generation stage performs parametric generation of the signal and idler photons, comprises the multiplexer connected to an output of the amplifier such that the multiplexer is connected by a common port to an end of a photonic crystal fiber (16) and such that an end of the fiber is connected to a connector (17) that functions as a mirror with a minimum reflectance for about 4% and a remaining port of the multiplexer is connected to an end of a fiber-based delay line (14). Another end of the delay line is connected to a reflector element (13) that allows parametrically generated signals to be reflected with a reflectance for about 50%. USE - Optical fiber parametric tunable oscillator for parametrically generating photonic crystal fibers in microscopy CARS. ADVANTAGE - The oscillator achieves a reduction in size and complexity of systems, fiber optic-based laser technology to be used and gives rise to fiber optic-based OPOs, so that the systems generated partially or entirely in fiber optics are particularly attractive due to potential to achieve compact laser structures, free of alignment and maintenance and low cost. The oscillator utilizes light sources to offer a very wide tuning range and a high power rating so as to reduce of fiber optic-based OPOs and perform synchronization of the generated signals and achievement of a resonant cavity based on the fiber without use of volume optics. The oscillator effectively achieves picosecond/femtosecond pulsed lasers in the fiber based on saturable absorption effect required in the oscillator that pumps the FOPOs. The oscillator achieves saturable absorption effect among graphene-based saturable absorbers, carbon nanotube saturable absorbers and saturable absorbing semiconductor mirror at global level with industrial maturity. The oscillator reduces repetition rate around 1 megahertz to achieve necessary peak power without generating too high of an average power so as to improve repetition rate in order to adjust peak power, while tuning the oscillator to be used, thus compensating power variations derived from the gain profile mismatch. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the optical fiber parametric tunable oscillator. 11Amplifier 13Reflector element 14Fiber-based delay line 15Wavelength division multiplexer 16Photonic crystal fiber 17Connector