| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical sub-carrier transmitter which may be driven with an output higher than that of the optical sub-carrier transmitter of prior art and moreover having digital signal of small amplitude. SOLUTION: The optical sub-carrier transmitter comprises a current input means 105 for inputting DC current to a gain region 101, by optically coupling a field-absorbing type light modulating region 102 for changing its light absorbing coefficient accompanying the applied field to one end side of the gain region 101; forming a Bragg reflector region 103 designed to result in the light spectrum formed of major two vertical modes of the output light to the upper surface of the other end side of the gain region 101, and by optically coupling the regions 102 and 103 sandwiching the gain region 101; a high-frequency wave input means 106 for externally inputting high-frequency signal to the field-absorbing type optical modulator region 102; and modulating current input means 108, 109 for inputting the bias signal modulated with digital signal to the Bragg reflector region 103. COPYRIGHT: (C)2006,JPO&NCIPI |
