Multi-spectral laser imaging is a technique that can offer a combination of the laser capability of accurate spectral sensing with the desirable features of passive multispectral imaging. The technique can be used for detection, discrimination, and identification of objects by their spectral signature. This article describes and reviews the development and evaluation of semiconductor multi-spec...

Microfluidic technologies are used to precisely manipulate fluid flow integrate solution-processed materials in semiconductor devices. Here, a microfluidic method for incorporating perovskite into semiconductor-based devices is developed by embedding microwires (MWs) Si microchannel platforms. The relies on pumping solution containing from the source be injected arrays using filter paper that a...

The performance, functionality and productivity of the semiconductor laser have been dramatically improved since its invention in 1962. Today it came to be indispensable for our life as optical components connecting home and the Internet as well as long-distance large-capacity trunk networks. It may be said that the information revolution pulled by the explosive spread of the Internet is origin...

The effect of light flux, redox couple concentration, and the number of panels on the electrical and chemical efficiency of a bipolar semiconductor photoelectrode array has been examined using a model based on the power characteristic curves of a single photoelectrochemical cell and the current-voltage characteristics of any desired electrolytic process. Data from a single bipolar CdSe//CoS pho...

A theory of four-wave mixing in semiconductor laser media is developed by considering the contributions of both the gain and index gratings created by the carrier-density modulation occurring at the beat frequency of the pump and the probe waves. The general formalism can be applied to semiconductor lasers operating below or above threshold. As an illustration, we consider the case in which the...

LUDWIG, R., P I E P ~ , w., and WEBER, H. G.: ‘Photonic ATM switching with semiconductor laser amplifier gates’, Electron. Lett., 1992, 28, (15), pp. 1438-1439 SAXTOFT, c.: ‘Photonic packet switch experiment employing a 2 t 2 switch matrix and a semiconductor laser amplifier’. Proc. Photonic Switching Topical Meeting, Kobe, Japan, 1990, Postdeadline Paper 14B-7 4 FORTENBERRV, R. M., LOWERY, A. ...

Coherent population trapping (CPT) is a common technique used in compact atomic clocks which requires two-phase coherent laser modes with a frequency difference in the GHz range for alkali atoms [1]. To improve the performance vs size trade-off of Cs atomic clocks, we develop a laser source generating two crosspolarized coherent laser fields at 852 nm. It relies on the dual-frequency and dual-p...

This paper presents a laser model for describing the effects of nonequilibrium carrier distributions. The approach is based on the coupled Maxwell-semiconductor-Bloch equations, with carrier–carrier and carrier–phonon collisions treated in the relaxation rate approximation. Using examples involving relaxation oscillation, current modulation, and optical injection, we demonstrate how the model c...

Semiconductor cascade lasers have larger photon noise than conventional semiconductor lasers as a result of positive correlations in photon emission in different gain stages which are connected electrically in series. The photon noise of a cascade laser can be related to the photon noise of a single-stage laser with a scaled external circuit impedance. This scaling relation for the photon noise...