A novel incoherent gain-assisted ring enhanced spectroscopy technique is presented in
overcoming the need for precise optical alignment and high-reflectivity dielectric mirrors. A …

Incoherent broadband cavity enhanced spectroscopy can significantly increase the effective
path length of light-matter interaction to detect weak absorption lines over broad spectral …

In this work, we report the usage of multi-longitudinal mode laser as an input source to
achieve a larger enhancement in the interaction length in cavity enhanced absorption …

Optical filters with relatively large FSR and narrow linewidth are simultaneously needed for
different applications. The ratio between the FSR and the 3-dB linewidth is given by finesse …

Gas weak absorption in near-infrared is considered as inherent limit hinder the achievement
of the miniaturized gas sensor. Thus, cavity enhanced absorption spectroscopy (CEAS) …

Dual-wavelength fiber lasers provide a low cost and simple method for the optical
generation of microwave and THz radiation over the electrical techniques. The main …