Panasonic Develops VCSEL Laser with World's Highest Data Transmission Rate

May 31, 2005
Panasonic Develops VCSEL Laser with World's Highest Data Transmission Rate

Panasonic, the leading brand by which Matsushita Electric Industrial Co., Ltd. is generally known, today announced the development of the 850 nm AlGaAs/GaAs VCSEL (Vertical Cavity Surface Emitting Laser) capable of high speed 12.5 Gbps modulation at low operating current of 8 mA. This laser will be used for a low-cost optical communication such as plastic fiber communication and spatial light transmission.

For high-speed operation, it is essential to reduce the parasitic capacitance in the laser. The developed VCSEL has our original planarized structure using BCB (benzocyclobutene) resin with low dielectric constant formed around the light emitting post structure. This structure hugely reduces the parasitic capacitance to less than one third of the conventional value from 0.7 pF to 0.2 pF. This has doubled the modulation bandwidth previously limited by the parasitic capacitance, realizing the world's highest data transmission rate of 12.5Gbps with 12 GHz relaxation oscillation frequency.

In addition, the optimization of the device structure employing current confinement by selective oxidation has realized a low threshold current of 1 mA, a high slope efficiency of 1.1 W/A that is almost three times higher than the conventional value. This has resulted in a low operating current of 8mA for 12.5Gbps modulation.

Panasonic aims to begin shipping the two types of surface emitting lasers (2.5 Gbps and 12.5 Gbps) in early 2006. Applications for forty domestic and nine international patents have been filed. These research and development results have been presented at Conference on Lasers and Electro-Optics (CLEO) 2005, held in Baltimore, U.S. from May 22 to 27, 2005.

Explore further: New tool provides successful visual inspection of space station robot arm

Related Stories

AggieSat4 scheduled to deploy from ISS

January 27, 2016

The AggieSat4 (AGS4) satellite carrying Bevo-2 will be unpacked and assembled aboard the International Space Station (ISS) on Wednesday (Jan. 27), and released into outer space on Friday (Jan. 29). AggieSat4 launched from ...

Recommended for you

Nanoparticle ink could combat counterfeiting

February 5, 2016

(Phys.org)—Researchers have demonstrated that transparent ink containing gold, silver, and magnetic nanoparticles can be easily screen-printed onto various types of paper, with the nanoparticles being so small that they ...

Chromosomes reconfigure as cell division ends

February 5, 2016

Cellular senescence—when a cell can no longer divide—is a programmed stage in a cell's life cycle. Sometimes, as in aging, we wish it didn't happen so much and sometimes, as in cancer, we wish it would happen more. Given ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.