The demand for broadband and the move to 100Gb/s transmissions
is increasing the need for accurate wavelength measurements. Yokogawa
has stepped up to release its AQ6150 series of Optical Wavelength
Meters. The new meters are designed to complement the company’s optical
spectrum analyzers. I met with Yokogawa’s Andrew Pinelli, National Sales
Manager, last week, and he provided me with some insights on the new
Some of the notable features of the product include the versatile view
modes in the display, showing up to 1024 wavelengths with an image or
image/chart view. Those performing manufacturing test will appreciate
its 0.3s measurement speed/sweep.
Of course, all optical
wavelength meters have a reference laser. What impressed me about this
one was its MTBF rate. Michael Kwok, Product manager, Optical Test and
Measurement for Yokogawa joined us in the meeting via telephone, and he
confirmed, “Yokogawa is using an extended life internal reference laser
with an estimated life span of 40,000 hours, which is considerably
longer than the rated life span of the other leading brand.” Nice.
now, the series includes two models. The AQ6151 is designed for high
accuracy and features an accuracy spec of +/-0.3pm. The standard
accuracy model, AQ6150, offers +/-1pm accuracy. Both units feature a
wavelength range of 1270 to 1650nm. The units employ a Michelson
interferometer and a high-speed FFT2 algorithm, which make it possible
to measure a multiple-wavelength optical signal. Built-in measurement
and analysis functions include drift analysis, average measurement, and
Fabry-Perot laser analysis.
While the company declined to let me
publish pricing on this, they did make the point that the units are
designed for low-initial cost as well as low maintenance costs due to
the long life expectancy of the reference laser.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.