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Spectral profile control method of a dispersion-tuned fibre laser is demonstrated. A dispersion-tuned fibre laser is a fast and widely tunable wavelength-swept laser without mechanical tunable filters. The lasing centre wavelength is tuned by changing the active mode-locking modulation frequency to that of the corresponding operating wavelength matching the fundamental repetition rate of the cavity...
Online detection of gas concentrations is important research topic recently. Based on the analysis of near infrared spectral absorption of acetylene, ammonia and carbon monoxide, a system using absorption type optic fiber for high sensitivity distributed detection of gases with wideband light source is demonstrated. Light source modulation harmonic measurement is presented in this paper. Wavelength...
An optical model of a transmission-type vertical-cavity electro-absorption modulator (EA) on Si/SiO2 for highspeed intra/inter-chip interconnects is developed and analysed by the method of single expression (MSE). As an external radiation source a wideband light source is suggested for avoiding the problem of usage of Si emitter. Transmission properties of symmetrical structure of a modulator consisting...
This paper presents a concept for a fully integrated spectrometer system based on Attenuated Total Reflection. Operation is in the mid-infrared spectral range (lambda = 1.8 mum-5 mum). The approach allows micromachined integration of all critical components of the system: a thermal IR source, optical filtering, the ATR element, a detector array and a signal processing chip. Two bulk-micromachined...
Emission wavelength from a confinement quantum dot (QD) strongly depends on its size and composition. As the application of the wideband light source for optical coherence tomography (OCT), we fabricated InP and InAsP quantum dots on GaInP lattice-matched to GaAs(001) with an intentionally broadened size and composition distribution. The growth technique is droplet hetero-epitaxy using organometallic...
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