Circular polarization (Image courtesy of: Dave3457)

German researchers are testing a new way of transferring data over optical fiber using a new laser polarization method that could boost the capacity of a single strand of fiber from 25 gigabits per second to as fast as 240 gigabits per second, while greatly reducing power consumption and heat.

The technique relies on oscillating polarization in the light beam instead of more traditional methods that rely on light intensity to transmit data. Current methods differentiate between digital “1s” and “0s” by using different light intensity.

“Normally, you make the throughput faster by pumping the laser harder, which automatically means you consume a lot of power and produce a lot of heat,” said Nils Gerhardt, chair of photonics and terahertz technology at Ruhr-University Bochum in Germany. “Which is actually a big problem for today’s server farms. But the bandwidth in our concept does not depend on the power consumption. We have the same bandwidth even [at] low currents.”

Using lower current means a less expensive power bill, particularly to remove excess heat generated from the high intensity beams of light sent across fiber cables in places like data centers. The new technique encodes a “1” as a burst of circularly polarized light that corkscrews to the left, while a “0” is represented by a burst of the same polarized light, only it corkscrews to the right. Right now, the technology is at the “proof of concept” stage in the lab, but the idea of light spinning has been around since at least 1997. The goal is to efficiently boost transmission capacity across optical fiber strands, which currently tops out at between 40-50 gigabits per second.

One of the benefits of optical fiber in fiber to the home applications is that it is considered almost infinitely upgradable, depending on laser transmission technology improvements. Currently, multiple strands of fiber are used in dedicated, very high-speed applications. If a provider uses all of its fiber strand capacity, it may have to divert excess traffic or lay down more fiber. Gerhardt’s technology could eventually expand existing fiber strand capacity by five times or more if it proves workable. But Gerhardt warns there is much research to complete, and he envisions the technology would be most useful initially in server farms and data centers, where cable lengths are shorter and heat concerns are greater. The technology would have to prove itself before being considered for internet backbone applications.

Competing technologies that could come to market before Gerhardt’s method include “mode-locked semiconductor laser diodes” and “quantum cascade lasers,” but neither have been successful much above 100 gigabits per second.

Two years after energy conservation groups revealed many television set-top boxes use almost as much electricity as a typical refrigerator, a voluntary agreement has been reached to cut the energy use of the devices 10-45 percent by 2017.

The Department of Energy, the Natural Resources Defense Council, the American Council for an Energy-Efficient Economy, the Appliance Standards Awareness Project, the Consumer Electronics Association, and the National Cable & Telecommunications Association agreed to new energy efficiency standards for cable boxes expected to save more than $1 billion in electricity annually, once the new equipment is widely deployed in American homes. That represents enough energy to power 700,000 homes and cut five million tons of CO2 emissions each year.

“These energy efficiency standards reflect a collaborative approach among the Energy Department, the pay-TV industry and energy efficiency groups – building on more than three decades of common-sense efficiency standards that are saving American families and businesses hundreds of billions of dollars,” said Energy Secretary Ernest Moniz. “The set-top box efficiency standards will save families money by saving energy, while delivering high quality appliances for consumers that keep pace with technological innovation.”

DVR boxes are the biggest culprits. American DVRs typically use up to 50W regardless of whether someone is watching the TV or not. Most contain hard drives that are either powered on continuously or are shifted into an idle state that does more to protect the life of the drive than cut a consumer’s energy bill. A combination of a DVR and an extra HD set-top box together consume more electricity than an ENERGY STAR-qualified refrigerator-freezer, even when using the remote control to switch the boxes off.

Manufacturers were never pressed to produce more energy-efficient equipment by the cable and satellite television industry. Current generation boxes often require lengthy start-up cycles to configure channel lineups, load channel listings, receive authorization data and update software. As a result, any overnight power-down would inconvenience customers the following morning — waiting up to five or more minutes to begin watching television as equipment was switched back on. As a compromise, many cable operators instruct their DVR boxes to power down internal hard drives when not recording or playing back programming, minimizing subscriber inconvenience, but also the possible power savings.

In Europe, many set-top boxes are configured with three levels of power consumption — 22.5W while in use, 13.2W while in standby, and 0.65W when in “Deep Sleep” mode. More data is stored in non-volatile memory within the box, meaning channel data, program listings, and authorization information need not be re-downloaded each time the box is powered on, resulting in much faster recovery from power-saving modes.

The new agreement, which runs through 2017, covers all types of set-top boxes from pay-TV providers, including cable, satellite and telephone companies. The agreement also requires the pay-TV industry to publicly report model-specific set-top box energy use and requires an annual audit of service providers by an independent auditor to make sure boxes are performing at the efficiency levels specified in the agreement. The Energy Department also retains its authority to test set-top boxes under the ENERGY STAR verification program, which provides another verification tool to measure the efficiency of set-top boxes.

Comcast, DirecTV, DISH Network, Time Warner Cable, AT&T, Verizon, Cox Communications, Charter Communications, Cablevision, Bright House Networks and CenturyLink will begin deploying new energy-efficient equipment during service calls. Some customers may be able to eventually swap equipment earlier, depending on the company.

[flv]http://www.phillipdampier.com/video/WCCO Minneapolis Check Your Cable Box 6-27-11.mp4[/flv]

WCCO in Minneapolis reported in 2011 cable operators like Comcast may make subscribers wait 30 minutes or more for set-top box features to become fully available for use after plugging the box in. (1:50)

Dish Networks' ViP722: Leaving on a 60-watt bulb 24 hours a day uses just a tad more than the ludicrous power consumption of this set top box: 55W while active and 52W while in standby.

The average pay television subscriber is spending at least $4 a month in hidden electricity costs thanks to the small set top boxes found on top of many television sets across North America.  That’s more than you are paying to run a modern refrigerator.

That stunning revelation comes from a study by the Natural Resources Defense Council, financed by the Environmental Protection Agency.

Costs for residents in the northeastern United States, where electricity rates are often higher, can reach $10 per month for customers with a DVR in the living room and a traditional set top box in the bedroom.  That’s up to $120 a year in hidden charges.

The pay television industry, which has driven the set top box into millions of homes, has never paid much attention to energy consumption of their equipment, if only because they don’t pay the power bills of their customers.  The NRDC found that many boxes even attempt to fool consumers into believing they are running in a reduced-power mode, by programming them to slightly dim the front clock when the box’s “power button” is switched off.

In reality, most set top boxes use nearly as much power “shut off” as they use left on.

The cost of these little power demons to North America’s power grid exceeds 18 billion kilowatt hours. More than seven power plants could not sustain that level of power, even if running 24/7 every day of the year.  The combined electric use of Alberta and British Columbia in a year would still not match the power consumption of every set top box in North America.

These revelations have led the U.S. Department of Energy to lay the groundwork to regulate the power consumption of set top equipment.  Once again, the United States would be a follower.  Europe cracked down on excessive power consumption of electronic equipment years earlier.  In the United Kingdom, for example, satellite providers include a box that can achieve a standby status that only consumes a handful of watts.  The trade-off is that consumers have to wait up to 90 seconds for the box to re-boot every morning when the television is first switched on.  Consumers have the ability to choose different power states as a menu option on the devices.

Some cable operators program their DVR boxes to spin down internal hard drives overnight, assuming no recording is scheduled at those times.  But many of these initiatives were designed to spare the longevity of the hard drive, not reduce power consumption overall.

Popular Science dug through the data and uncovered the best reasonable options subscribers have for boxes that at least snort their way onto your monthly utility bill, as opposed to pigging out at the trough (your wallet):

If You Have Comcast

In terms of energy efficiency, Comcast comes out as the lesser of several evils, but not by much. Comcast’s most energy-efficient boxes tend to be slightly more efficient than their equivalents at Verizon, Time Warner, and the satellite companies, and they also offer more choices in terms of hardware. The NRDC’s data picks the Motorola DCH70 as the best standard-def box (sucking down 10W while active, and 10W while on standby), the Pace RNG110 as the best high-def box (13W active, 12W standby), and the Motorola DCX3400 as the best HD/DVR (29W active, 28W standby).

I spoke to a Comcast representative who told me that typically, the company installs whichever box they want, but that if you request a specific box that they have in stock, they’ll happily install that one for you. They won’t order you a box from elsewhere, and this kind of hardware rotates in and out of availability fairly quickly, but at least you might have the option to choose.

If You Have Verizon FiOS

Verizon’s most efficient boxes are just okay, while its least efficient are some of the worst of any surveyed. Even worse, Verizon gives the customer absolutely no option about which box they get–you can’t request a specific box at any point. That doesn’t matter too much for the non-DVR boxes, as the NRDC’s findings only turned up one standard-def and one high-def box, but there’s a big gap in efficiency between the company’s best and worst DVRs. The most efficient is Motorola’s QIP7216, at an unremarkably 29W active and 28W standby, but the older Motorola QIP6416 clocks in at a lousy 36W active and 35W standby.

If You Have Time Warner Cable

Time Warner has a smaller selection of set-top boxes than either Verizon or Comcast, with only one averagely (in)efficient DVR and one startlingly inefficient standard-def box. For a high-def, non-DVR box, the Cisco Explorer 4250HDC is the most efficient, at 19W active and 18W standby, but Time Warner told me that that’s an older box that might be tough to find. The Time Warner rep was (surprisingly, given the company’s lousy reputation here in New York) quite helpful, and offered to try to track down one of the 4250HDCs if that was what I wanted.

If You Have DirecTV

Here we get to the satellite folks. DirecTV’s offerings are only slightly less efficient than Comcast’s or Verizon’s, with the (currently only) standard-def box coming in at 12W active, 9W standby, the best HD box (the DirecTV H24) at 16W active, 15W standby, and the best HD/DVR (the DirecTV HR24) at 31W active, 31W standby. The DVR is pretty lousy, efficiency-wise, but that’s nothing compared to the Dish Network’s craziness.

If You Have Dish Network

I don’t know what is happening inside the Dish Network’s DVRs. Given the energy usage, they might well be powering nuclear reactors. The “best” DVR Dish offers, the ViP922, uses 43W while active, and 40W while in standby–but the worst one, the ViP722, uses a ridiculous 55W while active and 52W while in standby.

If You Use Internet Video Streaming

Many are ditching traditional cable services for online services like Netflix and Hulu, and luckily, there are a whole bunch of gadgets that can play that content (and more) on a TV. They are also invariably more efficient than a cable box, to a startling degree. The Apple TV (reviewed here), which streams Netflix and plays music, movies, and TV from Apple’s iTunes store, uses a mere 3W while active and 0.5W while in standby. Roku‘s XR-HD, which streams Netflix, Hulu, Amazon Instant Video, and a whole bunch more, uses only 7W while active and another 7W while in standby. The Boxee Box, a curiously shaped media streamer that uses the open-source, ultra-powerful Boxee software, can play Netflix, stream video from other computers on its network, play media from a hard drive or thumb drive plugged into one of its USB ports, and stream from lots of apps (with Hulu hopefully to come soon). It was tested by an Ars Technica commenter whose measurements probably differ from the NRDC’s, but roughly estimates that it uses 13W while active and 13W while in standby.

[flv width=”640″ height=”388″]http://www.phillipdampier.com/video/CBC TV boxes guzzle power 6-27-11.flv[/flv]

CBC TV took a closer look at the pay television set top box: a real power guzzler.  (2 minutes)