| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical transmitter easily constituting a radio base station together with the optical transmitter itself in an optical/radio merged communication system at a low cost. <P>SOLUTION: By using electric amplitude modulated signals for which electric carrier signals having a frequency equal to the half value of the frequency of optional intermediate frequency signals generated in an electric oscillator 7 are amplitude-modulated in an electric modulator 8 by electric digital signals m (m=1, 2 or M or the like) taking M pieces of inputted values or electric frequency modulated signals for which they are frequency-modulated, by an optical modulator 6, carrier suppression double side band optical modulation is executed to output light from an optical multiplexer 5 which multiplexes the first and second optical signals of a single spectrum for which the difference of respective center frequencies generated in first and second single spectrum light sources 3 and 4 is equal to the frequency of radio signals. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
