Optical delay line and manufacturing method therefor

Details Optical delay line and manufacturing method therefor Optical delay line and manufacturing method therefor

2005-04-12

2005-04-12

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S027000, C385S042000, C065S408000

Reexamination Certificate

active

06879756

ABSTRACT:
An optical delay line of a configuration in which a number of components such as a circulator and an optical coupler is reduced is to be provided. To this end, the optical delay line has a configuration in which, after an optical fiber diffraction grating having a core subjected to refractive index modulation and a cladding partly cleared of its outer circumference and an optical fiber having a cladding partly cleared of its outer circumference are brought close to each other so that the cores have mutually parallel directions of an optical axis to fabricate a directional coupler, both ends of the optical fiber are connected into an optical fiber loop. In this way, an optical delay line to generate a specific time delay for controlling optical signals can be provided in small dimensions and with a small number of components.

REFERENCES:
patent: 4737007 (1988-04-01), Alferness et al.
patent: 4890893 (1990-01-01), Smoot
patent: 5574807 (1996-11-01), Snitzer
patent: 5737108 (1998-04-01), Bunch et al.
patent: 6011881 (2000-01-01), Moslehi et al.
patent: WO 9514946 (1995-01-01), None

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