Mid-infrared upconversion imaging using femtosecond pulses

Mid-infrared upconversion spectroscopy based on a Yb:fiber femtosecond laser

We present a system for molecular spectroscopy using a broadband mid-infrared laser with near-infrared detection. Difference frequency generation of a Yb:fiber femtosecond laser produced a mid-infrared (MIR) source tunable from 2100–3700 cm−1 (2.7–4.7 μm) with average power up to 40 mW. The MIR spectrum was upconverted to near-infrared wavelengths for broadband detection using a two-dimensional...

Mid-infrared upconversion spectroscopy

Generation and characterization of tunable mid-infrared femtosecond pulses

In this Chapter we describe the design of an optical parametric amplifier that allows the generation of infrared laser pulses suitable for ultrafast nonlinear spectroscopy on the OH-stretching mode of water molecules. Mid-infrared femtosecond pulses, tunable in the range of 2800-3800 cm with sub-100 fs duration and ~15 μJ energy are produced by an optical parametric amplifier driven at 1 kHz by...

Upconversion based continuous-wave mid-infrared detection

We present theoretical and experimental work on upconversion based mid-wavelength infrared detection using silicon detectors without the need for cryogenic cooling. We consider both multi-spectral imaging and point spectroscopy targeting several specific applications. OCIS codes: (190.7220) Upconversion; (300.6340) Spectroscopy, infrared; (100.2960) Image analysis;

Parametric generation and characterization of femtosecond mid-infrared pulses in ZnGeP2.

Ultrafast mid-infrared (IR) coherent radiation plays an important role in strong-field physics, wherein the use of longer wavelengths has reduced the optical intensities needed to drive light-matter interactions by orders of magnitude in comparison to near-IR radiation. Optimizing parametric interactions for generation and characterization of mid-IR pulses is an enabling step for those applicat...