Musings on optics, physics, astronomy, technology and life

Archive for December, 2015

Awaiting my OptIPuter…

I’ve been writing about optics and photonics professionally for more than a decade now. One of the continuing themes has been the ongoing quest to integrate optical technologies with existing silicon-based electronics to create all sorts of wonderful devices that could run a whole lot faster than their equivalents of today.

To that end, a team of researchers at three U.S. universities has created a prototype of a CMOS optical chip. (CMOS is the type of silicon technology that powers our computers and other devices that contain tiny processors.) If you want to know all the technical details behind this work, the short article I wrote for OPN contains a link to the original Nature paper, but you need a subscription to access it. (Or you could go to your local friendly university library, but I’m writing this post on New Year’s Eve, and I sincerely doubt any university libraries are open at the moment.)

Writing this newsbrief resonated with me because a friend recently asked me whether I have any plans to buy a new laptop computer, as the one I’m now using will be three years old next month. Just for grins and giggles, I gave a cursory glance to the Sunday-newspaper ad from a big-box store that sells tech stuff. Basically, the advertised laptops have the same range of processors as they did three years ago. Many of them have twice as much RAM and storage capacity as they did in January 2013, and of course they’re running Windows 10 (which, as humorist Dave Barry notes, “turns Windows 8 back into Windows 7”). Still, the laptops seem like the “same old, same old,” although I’m sure they don’t have half the letters worn off the keyboard from massive amounts of typing, as mine does. The excitement has moved to smartphones, fitness watches and other tiny gadgets.

It’s been about 20 years since I started following the field of high-performance computing, also known as supercomputing. I remember writing about the first computer that could operate at 1 teraflops, or 1 trillion floating-point operations per second. Today, the 10 fastest computers on planet Earth run at some multiples of 1 petaflops, or 1 quadrillion floating-point operations per second. Now, my 2013 laptop is a lot better than the 2004-era Windows XP machine that it replaced, but I don’t think it’s a thousand times faster.

Optics has been part of high-performance communications — and high-performance computer interconnects — for a while now. I would really like some of this optical (or optoelectronic) technology to filter down to the level of individual microprocessors and motherboards for desktop and laptop computers, never mind the smartphones and tablets that we all crave these days. However, given that humans were supposed to be living on Mars by now according to all those Apollo-era predictions, I’m not holding my breath.

Apollo 17

When I first noticed on Twitter that today is the 43rd anniversary of humanity’s last presence on the Moon, I felt ineffably sad. But then I noticed in someone’s follow-up tweet that you can relive (virtually) the last lunar exploration mission at

I tuned in to that website — produced by a couple of programmer/techie space enthusiasts with the cooperation of the NASA folks who put together the Apollo Flight Journal and the Apollo Lunar Surface Journal, as well as the surviving Apollo 17 crew members themselves — just in time to watch the real-time “coverage” of the lunar module’s ascent from the Taurus-Littrow valley. You can watch the video feed, listen to the conversations between the astronauts and Houston, and read the transcript of those communications. (And when I say “coverage,” I mean the plain NASA video and audio, without any commentaries from broadcast anchors. No Walter Cronkite here.)

Whether you’re old enough to remember watching Apollo missions on the family television set or were born after the Apollo program, you will probably find something fascinating on this website. As I type this, the two spacecraft, America and Challenger (obviously not the similarly named shuttle), are on the other side of the Moon, and the color TV camera that Gene Cernan and Jack Schmitt left behind is scanning the lonely surface. What was I saying about ineffable sadness?