High-quality InAlGaAs digital-alloy active regions using submonolayer superlattices were developed and employed in a 3-stage bipolar cascade multiple-active-region vertical cavity surface emitting laser (VCSEL) design. The photoluminescence intensity and linewidth of these active regions were optimized by varying the substrate temperature and digitization period. These active regions exhibit co...

We report on the performance of the first table-top prototype atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields (lin lin configuration). Our apparatus uses a vertical-cavity surface-emitting laser (VCSEL) tuned to the D1 line of Rb with the current modulation at the Rb hyperfine frequency. We demonstrate cancellation of the first...

In this paper we report on full C-band tunable, 10 Gbit/s capability, directly modulated micro-electromechanical system (MEMS) vertical-cavity surface-emitting laser (VCSEL) for next generation converged mobile fronthaul and backhaul applications, where the MEMS-VCSEL is used at the remote side of a wavelength routed WDM-PON system. To be compliant with the current ITU-T G.metro standardization...

We study the feasibility of fabricating an optical link for the SLHC ATLAS silicon tracker based on the current pixel optical link architecture. The electrical signals between the current pixel modules and the optical modules are transmitted via micro-twisted cables. The optical signals between the optical modules and the data acquisition system are transmitted via radiation-hard/low-bandwidth ...

KANJ, HOUSSAM. Circuit-Level Modeling of Laser Diodes. (Under the direction of Dr. Michael B. Steer.) In all semiconductor laser diodes the thermal, electrical, and optical characteristics are integrally related. In this work, a new approach to the modeling of laser diodes that integrates electrical, optical and thermal effects is presented. Also, it is demonstrated how physical device models b...

We report on a novel high power vertical cavity surface emitting laser (VCSEL) with order shallow grating, which enables single mode operation even for 6 mm long devices. A of over 3 W is obtained under pulsed operations oxide aperture. fan-shape beam sub-degree narrow divergence up to injection currents 5 A. Thanks the low effective index slow-light modes in VCSEL structure, grating pitch 2.5 ...

Relying on preliminary experiments, in this work we design a tunable 850 nm laser based hybrid combination of liquid crystal micro-cell with nanoimprinted grating and an electrically-pumped GaAs half-VCSEL. The optical is challenging due to the inherent tolerances technology, presence metals cavity need for single fundamental extraordinary mode emission over whole tuning range. To ensure proper...

The paper presents the results of experimental study an application phenomenon vibrational resonance (VR) for enhancement response a bistable vertical-cavity surface-emitting laser (VCSEL) to effect optical modulating signals. Specifically, two different cases were investigated: (a) control all-optical switching caused by modulated orthogonal injection from another VCSEL and (b) amplification a...

This paper presents a new approach to maximize the dispersion-limited distance of vertical cavity surface emitting lasers (VCSELs) operating at 1550. 127 nm with 10 Gb/s bit rate. Optical non return to zero (NRZ) signal is generated by using an optical band pass filter (OBPF) along with Mach-Zehnder interferometer (MZI) at the output of VCSEL. A third order super-Gaussian and fourth order Butte...