单词:distributed feedback semiconductor laser
单词:distributed feedback semiconductor laser 相关文章
By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca
EXPLORATIONS - The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can
The United States Navy has demonstrated a new laser weapon operating in the Persian Gulf. The Laser Weapons System, or LaWS, is deployed on the USS Ponce transport ship. A live test firing of the weapon was recently carried out for Cable News Network
中文 英文 缩写 放大 zoom in 放大的随机发射 Amplified Spontaneous Emission ASE 放大自辐射噪声 Amplified Spontaneous Emission Noise ASEN 放电 discharge 放号 number distribution
By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti
The State Grid Corporation of China, the country's largest energy distributor is taking further steps to facilitate the use of distributed power generation. This is an incentive for individuals who have the intention and capability to build their own