Showing papers by "Robert A. Minasian published in 1998"
TL;DR: In this paper, a new technique for tuning the gain of a gain-clamped erbium-doped fiber amplifier is presented, which uses a chirped fiber grating (with linear slope reflectivity) and a narrowband uniform grating to form the laser cavity.
Abstract: A new technique for tuning the gain of a gain-clamped erbium-doped fibre amplifier is presented. It uses a chirped fibre grating (with linear slope reflectivity) and a narrowband uniform grating to form the laser cavity. By strain tuning the input narrowband grating, the laser feedback is varied and the amplifier inversion and gain can be controlled. This technique provides a continuous gain tuning capability, together with clamped gain operation.
15 citations
TL;DR: In this paper, an all-fiber acoustooptic phase modulator using a zinc oxide (ZnO) film deposited by modified single source chemical vapor deposition was reported.
Abstract: For the first time we report an all-fiber acoustooptic phase modulator using a zinc oxide (ZnO) film deposited by modified single source chemical vapor deposition. This technique allows deposition over the full 360/spl deg/ fiber surface without the need for sample rotation, greatly simplifying the manufacturing process. The maximum phase shift measured for our 6 mm long devices was 3.5 rads for a drive power of 580 mW. Unlike devices fabricated using sputtered ZnO films the maximum attainable phase shift is not significantly limited by thermal and mechanical loss effects at higher driving powers which we attribute to the excellent chemical composition of our chemical vapor deposition (CVD) grown films. A maximum efficiency of 0.28 rad//spl radic/(mW)/cm of device length was measured which may be attributed to the relatively thin films used in this experiment (0.4-0.9 /spl mu/m).
11 citations
07 Jun 1998
TL;DR: In this paper, a new beam-former based on a WDM grating topology is presented, which can synthesize a large number of beams with the minimum number of interconnects, and results for the ultimate capacity of grating true-time-delay beam-formers are presented.
Abstract: A new grating based beam-former is presented which can synthesise a large number of beams with the minimum number of interconnects. A partitioned WDM grating topology is also described which removes the frequency and beat noise limits, and results are presented for the ultimate capacity of grating true-time-delay beam-formers.
6 citations