The use of a high-power 1 . 5 ~ DFB laser and a linearised Ti : LiNbO, Mach-Zehnder modulator as a transmitter in a CATV lightwave system is reported. The performance is compared with directly-modulated l.5pm-wavelength DFB lasers in 60channel transmission over 16 km of conventional singlemode fibre. The transmission of 52 high-frequency channels is demonstrated (450-750 MHz) in anticipation of...

The intensity response of distributed-feedback (DFB) fiber laser to external acoustic excitation has been investigated. On that basis, an intensity modulated sensing system based on DFB fiber laser has been constructed. Acoustic pressure sensitivity of the intensity-type sensor at frequencies ranging from 800 Hz to 9 kHz has been obtained by experiments for the first time to the authors’ knowle...

is a genuine feature of this laser configuration, that also appears in other calculations. As can be concluded from Fig. 3, the use of a.efI in eqn. 1 is essential for a reasonable linewidth calculation of DFB lasers with a reflecting end facet. It can be shown that a comparably strong effect also occurs for two reflecting end facets with KL>2 and in the case of the phase-shifted DFB laser with...

A label free biosensor based upon a vertically emitting distributed feedback DFB laser has been demonstrated. The DFB laser comprises a replica-molded, one-dimensional dielectric grating coated with laser dye-doped polymer as the gain medium. Adsorption of biomolecules onto the laser surface alters the DFB laser emission wavelength, thereby permitting the kinetic adsorption of a protein polymer...

Thin film organic lasers (TFOLs) represent a new generation of inexpensive, mechanically flexible devices with demonstrated applicability in numerous applications in the fields of spectroscopy, optical communications and sensing requiring an organic, efficient, stable, wavelength-tunable and solution-processable laser material. A distributed feedback (DFB) laser is a particularly attractive TFO...

We demonstrate an integrated distributed feedback (DFB) laser array as a dual-wavelength source for narrowband terahertz (THz) generation. The laser array is composed of four heterogeneously integrated III-V-on-silicon DFB lasers with different lengths enabling dual-mode lasing tolerant to process variations, bias fluctuations, and ambient temperature variations. By optical heterodyning the two...

Several Aedes aegypti field populations are resistant to neurotoxic insecticides, mainly organophoshates and pyrethroids, which are extensively used as larvicides and adulticides, respectively. Diflubenzuron (DFB), a chitin synthesis inhibitor (CSI), was recently approved for use in drinking water, and is presently employed in Brazil for Ae. aegypti control, against populations resistant to the...

To date there are no analytical techniques designed to exclusively measure bioavailable iron in marine environments. The goal of this research is to develop such a technique by isolating the bioavailable iron using the terrestrial siderophore desferrioxamine B (DFB). This project contained many challenging aspects, but the specific goal of this study was develop a robust analytical technique fo...