Multiple grating optical waveguide monitor

Details Multiple grating optical waveguide monitor Multiple grating optical waveguide monitor

2005-06-21

2005-06-21

Kang, Juliana (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S010000, C385S018000, C385S047000

Reexamination Certificate

active

06909826

ABSTRACT:
An optical monitoring arrangement utilizes the properties of a blazed Bragg grating to redirect a portion of an optical signal out of the axial path and into a detecting device. A plurality of blazed Bragg gratings are utilized, each having unique properties, to increase the robustness of the monitor. In particular, by utilizing a plurality of N gratings, the bandwidth of the monitor may be increased N-fold (assuming no overlap in wavelength between gratings). Alternatively, an improvement in resolution can be obtained by utilizing a narrower bandwidth and measuring N times the number of raw data points within that bandwidth. A combination of increase in bandwidth and resolution may be obtained by a comprise between these two extremes. Chirped blazed gratings may also be employed.

REFERENCES:
patent: 5461687 (1995-10-01), Brock
patent: 5946128 (1999-08-01), Pack
patent: 6097859 (2000-08-01), Solgaard et al.
patent: 6122422 (2000-09-01), Koeppen et al.
patent: 2001/0014196 (2001-08-01), Solgaard et al.
patent: 1096280 (2001-05-01), None
patent: 1130656 (2001-09-01), None
patent: WO 01/37014 (2001-05-01), None

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