Method of trimming optical power

Details Method of trimming optical power Method of trimming optical power

1990-05-07

1991-08-20

Gonzalez, Frank

Optical waveguides

With optical coupler

Input/output coupler

385 53, G02B 636

Patent

active

050408623

ABSTRACT:
The amount of light coupled to an optical fiber from a laser diode is limited to a predetermined maximum power. A lens receiving the laser output is adjusted to maximize the power received at the core portion of the fiber endface. The power coupled to the fiber is then reduced to the predetermined power level by insertion of a polarizing or absorbing filter in the optical path. When a polarizing filter is employed, it is rotated until the predetermined power is coupled to the fiber. If a quarter wave plate is included, negative effects due to back reflections from the fiber end face into the laser diode can be eliminated.

REFERENCES:
patent: 4529262 (1985-07-01), Ashkin et al.
patent: 4616899 (1986-10-01), Schlafer
patent: 4747657 (1988-05-01), Chaoui et al.
patent: 4790618 (1988-12-01), Abe
patent: 4852959 (1989-08-01), Werner et al.
patent: 4875752 (1989-10-01), Suzuki

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