Overview

The Agilent DSO91204A Infiniium high performance oscilloscope at CIT offers ease of acquisition of multiple voltage signals at high speed and low jitter, and ease of analysis and exception identification.

Main features:

•    40 gigasamples/second all 4 channels simultaneously
•    150ps hardware-event and 75ps software-event identification
•    more than 150,000 measurements per second and 300,000 triggers per second

The oscilloscope is part of the PDD's Laser Dynamics Laboratory. Click here for a PDF brochure.

View technology

Location:

PDD, CIT

Case Study

Semiconductor laser dynamics are generally constrained in frequency to the laser relaxation oscillation frequency set by the carrier and photon lifetimes in the cavity. The spontaneous emission noise drives dynamics and also acts to obscure meaning in intensity trace captures. To overcome these experimental issues in quantum-dot laser injection, it was necessary to collect multiple channels simultaneously and sample at rates significantly higher than the relaxation oscillation. The device phase dynamics were generated through interference in a 3-by-3 fused coupler, and the gain dynamics through a weak probe signal selected at the output by a pair of matched fibre Bragg gratings. Due to the high sampling rate and low channel skew, a direct measurement of the 3 dimensional (real and imaginary electric field, carrier number) laser parameters was visible in the time domain.