The Blonder Tongue FIBT-S3A and MIBT-S3A Series (Fiber Optic VSB/AM Transmitter) of transmitters provides a robust system for transferring broadband CATV signals over single mode optical fibers. Both series have a a frequency bandwidth of 45- 860 MHz that accommodates a variety of different modulation formats such as AM/VSB, 8VSB, QAM, QPSK, etc. The Blonder Tongue FIBT/MIBT-S3A series transmitters use high-power, low noise 1310 nm distributed feedback (DFB) laser diodes.