Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2006-10-24
2006-10-24
Bovernick, Rodney (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S024000, C359S341100
Reexamination Certificate
active
07127139
ABSTRACT:
An object of the invention is to provide an optical multiplexing method and an optical multiplexer, capable of fixing lights of different wavelengths at required wavelengths to stably multiplex them with a simple optical circuit configuration. To this end, in the present optical multiplexer, there is provided a tilted FBG, which is formed on an optical fiber through which a first light is propagated, with a grating direction thereof being tilted to an axial direction of the optical fiber, and has the sufficiently high reflectance to a second light (multiplexed light) of a wavelength different from that of the first light. The multiplexed light emitted from a light source is irradiated to the tilted FBG, via a free space from an angle direction determined according to a grating pitch of the tilted FBG and the wavelength of the multiplexed light, to be coupled within the optical fiber. Further, a low reflective FBG reflecting light coupled within the optical fiber is formed on the optical fiber, to achieve a resonance structure between the low reflective FBG and the light source, thereby stabling the wavelength of the multiplexed light.
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Hayashi Etsuko
Onaka Hiroshi
Onaka Miki
Bovernick Rodney
Stahl Mike
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