Laser diode module with a built-in high-frequency modulation IC

Details Laser diode module with a built-in high-frequency modulation IC Laser diode module with a built-in high-frequency modulation IC

2007-02-13

2007-02-13

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular beam control device

Modulation

C372S036000, C372S038070, C372S038080

Reexamination Certificate

active

10998733

ABSTRACT:
A laser diode module with a built-in high-frequency modulation IC used to remove the reflected noise generated as the laser beam reads the signal to be played back and directly packaged within a metal cap. The high-frequency modulation IC creates an electrical connection through wire bonding with several connection legs and the laser diode module. The packaged laser diode module has four connection legs. Two of these connection legs act as a positive and a negative terminal for supplying power to the built-in high-frequency modulation IC. The other two connection legs are electrically connected to an external automatic power control (APC) circuit and act as the positive terminal of the laser diode and the photo diode, respectively. In this way, the inconvenience of externally attaching a high-frequency current producing circuit board can be avoided, the productivity can be enhanced and the radiation of electromagnetic interference (EMI) can be reduced.

REFERENCES:
patent: 6011768 (2000-01-01), Taguchi
patent: 04-352378 (1992-07-01), None
patent: 05-082896 (1993-02-01), None
patent: 05-167200 (1993-02-01), None

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