Miniature optical modulator module using flexible printed circuit board

An optical modulator module comprising:

• a bendable flexible printed circuit board in which a circuit pattern is formed, and to which control signals are inputted from the outside;
• an optical modulator element modulating an incident light according to a driving voltage and sending out the modulated light;
• a transparent substrate through which the incident light and the modulated light pass, and in which a circuit pattern is formed;
• and
• a driving integrated circuit electrically connected with the flexible printed circuit board, and supplying the optical modulator element with the driving voltage according to the inputted control signals,
• wherein the flexible printed circuit board is electrically connected with the transparent substrate, and
• wherein the optical modulator element is attached to the transparent substrate, and the driving integrated circuit is attached to the flexible printed circuit board, and the circuit pattern of the transparent substrate is partly overlapped with the circuit pattern of the flexible printed circuit board.

An optical modulator module comprising:

• a bendable flexible printed circuit board in which a circuit pattern is formed, and to which control signals are inputted from the outside;
• an optical modulator element modulating an incident light according to a driving voltage and sending out the modulated light;
• a transparent substrate through which the incident light and the modulated light pass, and in which a circuit pattern is formed;
• and
• a driving integrated circuit electrically connected with the flexible printed circuit board, and supplying the optical modulator element with the driving voltage according to the inputted control signals,
• wherein the flexible printed circuit board is electrically connected with the transparent substrate, and
• wherein the optical modulator element and the driving integrated circuit are attached to the transparent substrate, and the circuit pattern of the transparent substrate is overlapped with the circuit pattern of the flexible printed circuit board on a predetermined part.