The low power Laser Pointer are also enough to achieve the goal

The low power Laser Pointer are also enough to achieve the goal.
And public-private partnership between the operator / service provider, to achieve a cost-effective plan to develop EDRS. Japan attaches great importance to the development of the data relay and tracking satellite, the development of four steps: The first step is the use of the Engineering Test Satellite tested; The second step is to test the Communications Engineering Test Satellite; 3 data of the third step Following the satellite key technologies - laser communications is the use of optical inter-orbit communications engineering test satellite test; fourth step is to launch two practical data relay satellite. Japanese engineering test satellite launched in August 1994 on the 6th, but did not reach its intended orbit, but still the S-band relay link, Ka-band relay link, laser communications links and data relay test.
To the use and development of semiconductor lasers for a broad range of space data relay satellite technology - laser communication Abstract In order to overcome the deficiencies and shortcomings of ground-based measurement and control system, and in order to adapt to the future development of space technology, the United States, the European Union, Japan, the development of the Tracking and Data Relay Satellite System. China's first data relay satellite on the 1st 01 star was launched in 2008, indicates that China began to build their own of TDRSS. Tracking and data relay satellites for its relatively large coverage and forwarding earth station in low Earth orbit spacecraft tracking, monitoring and control signals and low-orbit spacecraft sent back to the ground data, image, voice information in real time. The laser beam color of Laser Pointer will also decide the price.
Because of its prominent features and unique advantages, a fundamental solution to the high coverage of the monitoring and control, communications, and also to solve the technical problems of high-speed data transmission and multi-target monitoring and control communication, the long arc of a variety of spacecraft continuous service, high economic benefits, therefore much of the space powers attention since its inception, the United States, the Soviet Union / Russia, Europe, and Japan have established or under construction in the TDRSS system. The first generation system April 4, 1983, the U.S. space shuttle Challenger launch the first one, "Tracking and Data Relay" (TDRS) satellite until the six TDRS satellite launch in January 1993, the system has in orbit and the orbit backup capacity, this is the real completion of the networking process. Power of  Laser Pointer are higher than about 200mW. 
Homojunction and heterojunction laser works, which cited the work process of the double heterostructure lasers, why has the unique advantages of the semiconductor laser produced by the laser provides a theoretical basis from here, semiconductor lasers in all aspects of life have played a huge role in improving our lives, particularly in high-power semiconductor lasers, for example, it has a unique charm, will make it in the international and domestic broader development and application prospects due to restrictions on the level of knowledge and the development of the prospects for the semiconductor laser can not make accurate theoretical basis, and more from the overall development of the idea to grasp the future to strengthen the theoretical knowledge and practice to enhance the level.