Patent ID: 7474678

Claim:
An optically pumped semiconductor laser comprising: an output mirror and a reflective mirror for forming a resonant region; a gain medium disposed between the output mirror and the reflective mirror; a reflective body disposed between the output mirror and the gain medium to reflect a source light received in a direction substantially perpendicular between the output mirror and the gain medium to activate the gain medium to generate a basic wavelength; a nonlinear crystal disposed between the reflective body and the output mirror to generate a predetermined wavelength that is second harmonic of the basic wavelength generated from the gain medium; a filter disposed on a surface of the nonlinear crystal opposite to the reflective body to reflect the predetermined wavelength and to transmit the basic wavelength; and a selective reflective part installed on a surface of the output mirror opposite to the nonlinear crystal to transmit the predetermined wavelength and to reflect the basic wavelength.