<title>Miniature green lasers for optical recording and storage</title>

Abstract

ABSTRACTHere we report LD pumped solidified miniature Nd:YAG laser and Nd: YVO4 laser with KTPcrystal as intracavity frequency doubling material. Using 1W LD 70 mW and 80 mW of the green laser output in TEMOO mode have been measured for Nd:YAG laser and Nd:YVO4 laser, respectively. The output stability is better than and the beam quality coefficient M2 is smallerthan 1.2. The laser is small in size and very suitable for optical recording and storage.KEYWORDS: miniature CW green laser, LD pumped, optical recording and storage ' 1. INTRODUCTION Now the Information age has come. Optical recording and storage become very important for societydeveloping. Laser diode (LD) are broadly used in Optical recording and storage field. But wavelength of theinfrared LD used in the field is still relatively longer, and is a limit to raise the storage density. Blue- green lasers have much shorter wavelengths. They can be focused into a much smaller spot and enhance the storage density several times. Many efforts have been made to develop blue-green LDs. But up to now no