93 % Conversion Efficiency from a Fiber Optical Parametric Oscillator
ABSTRACT We present a χ(3) fiber parametric oscillator with high conversion efficiency from the input pump wave to the output parametric sidebands. By introducing an intracavity filter detuned from the oscillator's phase-matched frequency conversion efficiencies considerably higher than those possible when operating at the phase-matched frequency are demonstrated. Experimentally we are able to obtain a total internal conversion efficiency in excess of 93% from the pump to the Stokes and anti-Stokes sidebands.
Article: Fiber optical parametric oscillators[Show abstract] [Hide abstract]
ABSTRACT: Recent results of experimental investigations of parametric conversion of electromagnetic radiation in fibers are presented. The main attention is paid to the description of continuous-wave (CW) and pulse fiber optical parametric oscillators (FOPOs) operating in the spectral range from 0.5 to 2 µm. Requirements to obtaining effective generation and possible problems in FOPO design are discussed. Results of the development of a CW tunable FOPO with pump by an ytterbium-doped fiber laser, which allows generation of radiation with wavelengths shorter than 1 µm, are considered in detail.Optoelectronics Instrumentation and Data Processing 07/2013; 49(4):363-382. DOI:10.3103/S8756699013040031
[Show abstract] [Hide abstract]
ABSTRACT: We propose and demonstrate a synchronously pumped fiber optical parametric oscillator (FOPO) operating in the normal dispersion regime. The FOPO generates chirped pulses at the output, allowing significant pulse energy scaling potential without pulse breaking. The output average power of the FOPO at 1600 nm was ∼60 mW (corresponding to 1.45 nJ pulse energy and ∼55% slope power conversion efficiency). The output pulses directly from the FOPO were highly chirped (∼3 ps duration), and they could be compressed outside of the cavity to 180 fs by using a standard optical fiber compressor. Detailed numerical simulation was also performed to understand the pulse evolution dynamics around the laser cavity. We believe that the proposed design concept is useful for scaling up the pulse energy in the FOPO using different pumping wavelengths.Optics Letters 09/2013; 38(18):3616-3619. DOI:10.1364/OL.38.003616 · 3.18 Impact Factor
[Show abstract] [Hide abstract]
ABSTRACT: Imaging based on coherent anti-Stokes Raman scattering (CARS) relies on the interaction of high peak-power, synchronized picosecond pulses with narrow bandwidths and a well-defined frequency difference. Recently a new type of fiber-based CARS laser source based on four-wave-mixing (FWM) has been developed. In order to enhance its spectral resolution and efficiency, a FWM based fiber optical parametric oscillator (FOPO) is proposed in this work. The source delivers 180 mW with 5.6 kW peak power for the CARS pump and 130 mW with 2.9 kW peak power for the Stokes signal. CARS resonances around 2850 and 2930 cm−1 can be resolved with a resolution of 1 cm−1 enabling high-contrast, spectrally resolved CARS imaging of biological tissue.Optics Express 09/2014; 22(18). DOI:10.1364/OE.22.021921 · 3.53 Impact Factor