Patent ID: 8743918

Claim:
An FSR-matched modulated laser with enhanced modulation efficiency, the FSR-matched modulated laser comprising: (a) a M-laser, said M-laser including: (i) a back reflector; (ii) an output coupler, having a mirror with partial transmission quality, wherein said output coupler is positioned facing said back reflector with a distance L between said output coupler and said back reflector, wherein said distance L is a cavity length; (iii) a gain medium disposed between said output coupler and said back reflector; and (iv) a light modulation means disposed between said output coupler and said back reflector, wherein said M-laser has a free spectral range, wherein said modulation means has a modulation means frequency f m , and wherein said modulation means frequency f m is equal to an integer times said free spectral range; and (b) a modulation source including: (i) a laser power supply; (ii) a bias T; (iii) a power line, said power line feeding power from said laser power supply to said bias T; (iv) a modulation generator; (v) a bias T modulation line, said bias T modulation line feeding modulation signal from said modulation generator to said bias T; (vi) a laser feed line, said laser feed line feeding said power from said bias T to said gain medium; and (vii) a direct modulation line, said direct modulation line feeding said modulation signal from said modulation generator to said light modulation means.