Method for coupling diode array light into an optical fiber

Details Method for coupling diode array light into an optical fiber Method for coupling diode array light into an optical fiber

2005-01-11

2005-01-11

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S031000, C385S037000, C359S341100

Reexamination Certificate

active

06842570

ABSTRACT:
An optical system (10) that couples pump light (30) into a signal fiber (12) of a fiber array laser/amplifier. The system (10) includes a tapered light guide (TLG) (24) optically coupled to the signal fiber (12) so that the signal light propagates into a single-mode core (48) extending through the TLG (24). The TLG (24) includes a diffraction grating aperture (34) through which the pump light (30) is coupled into the TLG (24). An array of diode emitters (28) is positioned adjacent to the diffraction grating aperture (34) so that the pump light (30) is diffracted into the TLG (24). The pump light (30) is reflected off of the interface (40) between the TLG (24) and air. The angle of the pump light (30) as it is reflected off of an interface (40) between the TLG (24) and air decreases so that the pump light (30) is contained within the signal fiber (12).

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