CLEO 2007 Practice Talks

Andreas Schmitt-Sody

Mode Locked Bidirectional Ring Laser as a Two-level System

The population transfer between the two pulses in a mode locked ring laser can be the direct analogy of the population oscillation (Rabi cycle) in a two-level atom.

Andreas Velten

Intracavity Pumped Picosecond Optical Parametric Oscillator for Intracavity Interferometry.

A picosecond pulse circulating inside a mode-locked vanadate laser, pumps twice/round-trip a LiNbO₃ crystal, creating two non-interacting signal pulses circulating in a resonant cavity. This configuration is ideal for intracavity interferometry applications.

Zahyun Ku

Experimental Comparison of Circular, Elliptical and Rectangular (Fishnet) Negative-Index Metamaterials

We fabricate and characterize the negative-index metamaterials (NIMs) at near infrared wavelength (~2 microns) to compare the geometrical dependence and demonstrate the optical properties of NIMs with circular, elliptical and rectangular holes penetrating through metal/dielectric/metal films. Our experiments reveal NIMs with elliptical and rectangular holes show similar figure of merit (FOM), however, transmission is better for NIM with rectangular holes.

Liang Xue

CW, High Power, Single-Longitudinal-Mode MID-IR DFB Laser with Large Tunability Based on Chirped-Grating Design

We have demonstrated CW, single-longitudinal-mode, distributed-feedback (DFB) operation on an antimonide-based type-II quantum-well laser in the mid-IR wavelength range (3-5 microns). Record high output power of 300 mW per side was obtained at 77 K. Recently, tunability of 21 nm (14 cm^-1 or 420 GHz) was also achieved based on chirped-grating DFB design on the same laser.

Nathan Withers

Y-Junction-Coupled S-Section InAs/InGaAs/GaAs Quantum-Dot Ring Lasers with High Unidirectionality

We report on fabrication and characterization of Y-junction-coupled S-section InAs/InGaAs/GaAs quantum dot ring lasers with high unidirectionality. The new design suppresses the unwanted counterpropagating modes more effectively than in the previous S-section-racetrack design.

Yan Li

Two-section Quantum Dot Lasers with 20-dB Modulation Efficiency Improvement

A 20-dB enhancement in the amplitude modulation efficiency and a gain lever of 30 is observed in a two-section quantum dot laser. A novel modulation response equation is derived to explain the device behavior.

Yongchun Xin

Characterization of the Static and Dynamic Parameters in a 1.3-micron Quantum Dot Mode-locked Laser

The static and dynamic parameters governing pulse width in the Haus Master-Equation are measured using LI curves, pulsed performance and the segmented-contact method. The relationship between QD-MLL performance and QD parameters is studied.

Monolithic 1.55-micron GaInNAsSb Quantum Well Mode-Locked Lasers

The first monolithic GaInNAsSb/GaNAs 1550-nm mode-locked lasers are reported on a GaAs substrate. A repetition rate of 5.8 GHz has been realized.

Tuesday, May 1st, 11:00am

Center for High Technology Materials, Room 101

A light lunch will be served.

Download announcement as PDF file.

View photos from the event.