Steevy Joyce Cordette

High-power parametric conversion from near-infrared to short-wave infrared

We report the design of an all-fiber continuous wave Short-Wave Infrared source capable to output up to 700 mW of power at 1940 nm. The source is tunable over wavelength intervals comprised between 1850 nm and 2070 nm depending on its configuration. The output can be single or multimode while the optical signal to noise ratio ranges from 25 and 40 dB. The architecture is based on the integrated association of a fiber optical parametric amplifier and a Thulium doped fiber amplifier.

Bandwidth and repetition rate programmable Nyquist sinc-shaped pulse train source based on intensity modulators and four-wave mixing

We propose and experimentally demonstrate an all-optical Nyquist sinc-shaped pulse train source based on intensity modulation and four-wave mixing. The proposed scheme allows for the tunability of the bandwidth and the full flexibility of the repetition rate in the limit of the electronic bandwidth of the modulators used through the flexible synthesis of rectangular frequency combs. Bandwidth up to 360 GHz at 40 GHz rate and up to 45 frequency lines at 5 GHz rate are demonstrated with 40 GHz modulators.

Broadly tunable source around 2050 nm based on wideband parametric conversion and thulium–holmium amplification cascade

We report the design of a short-wave infrared continuous-wave light source featuring a 20 mW average output power, and with a wavelength that can be freely selected in the 2000-2100 nm range amid a low power ripple. The operating principle relies on the simultaneous broadband parametric conversion of two seeds in a highly nonlinear silica fiber pumped in the L-band followed by amplification and equalization in an appended thulium- and holmium- doped fiber cascade directly pumped by their respective previous stage.

Versatile High Repetition Rate 2-μm Pulsed Source Based on Wideband Parametric Conversion

We report an all-fiber pulsed source based on parametric conversion followed by thulium amplification able to deliver picosecond pulses at a repetition rate selectable between 2 and 5 GHz, of which central wavelength can be freely selected in the 2-μm region. A very versatile Nyquist pulse shaping of the parametric pump, which allows for the electrical control of the pulse train, enables such a freedom in the repetition rate selection, as well as some control in the pulse duration. We also show that data can be embedded in the output pulse train resulting in a high-quality Gb/s return-to-zero transmitter. Such a programmable short-wave infrared laser is of high interest for sensing or nonlinear optics applications around 2000 nm that require a fine adjustment in both the spectral and temporal domains.

Tunable Thulium-Assisted Parametric Generation of 10 Gb/s Intensity Modulated Signals Near 2 μm

We report the demonstration of an all-fiber 10Gb/s modulation capable source near 2μm, tunable over more than 60nm with powers exceeding 2dBm, based on parametric conversion and appended Thulium amplification.

Widely tunable picosecond-pulsed source near 2 μm based on cascaded Raman wavelength shifting

We demonstrate a cavity-less picosecond pulsed source near 2μm, tunable over more than 200nm based on third order cascaded Raman wavelength shifting. Up to 40% conversion is achieved for 100mW peak powers at 200 MHz repetition rate.

Thulium Assisted Parametric Conversion from Near to Short Wave Infrared

We report an all-fiber continuous wave source, tunable between 1935-1980nm, based on parametric conversion combined with thulium amplification. More than 150mW of power and 30dB optical signal-to-noise ratio is obtained over the entire range.

Advances in frequency comb synthesis-based Nyquist pulse-train carver and applications in optical systems

We will review the recent advances made on Nyquist pulse-train carvers based on the synthesis of rectangular frequency combs. We will show how nonlinear effects can be exploited as a complement to the modulator-based comb synthesis in order to extend the bandwidth of the pulse generation. Pulse trains with width in the picosecond range and adjustable repetition rate are easily generated. Such sinc-shaped Nyquist pulses can show minimal inter-symbol interference time multiplexing and guard band free wavelength multiplexing using simple off-the-shelf components, thus ideal for telecommunication. Applications of the all-optical carver in transmission systems will be described. This pulse carver is also useful for the easy generation of pulse trains in any wavelength band for non-telecom application such as supercontinuum generation of wavelength conversion.