Optical device with reduced temperature dependence
AssigneeGemfire Corporation
InventorsHindrick Freerk Bulthuis, Tony C. Kowalczyk, Michael G. Jubber
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Abstract
Optical apparatus with improved center wavelength temperature stability. In an embodiment, an AWG has a plurality of slots inserted along the optical paths. The slots contain one or more compensation materials which collectively correct for an order Q temperature dependency of the AWG base material. Q>=2 or the number of compensation materials is at least 2 or both.
Claims39
Optical apparatus including an output port in optical communication with an input port via an arrayed waveguide grating, the apparatus having a plurality of passbands including a subject passband, the subject passband having a center wavelength,
- wherein the first through Q'th order derivatives with respect to temperature of the center wavelength, Q>=2, are substantially equal to zero throughout a temperature range of −5 C to +70 C.
Optical apparatus comprising a plurality of optical paths through a material system, each of the optical paths having a respective effective optical path length which differs from that of an adjacent optical path by a respective effective optical path length difference,
- wherein the first through Q'th order derivatives with respect to temperature of each of the optical path length differences, Q>=2, are substantially equal to zero throughout a temperature range of −5 C to +70 C.
Optical apparatus comprising a plurality of optical paths through a material system,
- the material system including core and cladding materials which confine the optical paths in at least one dimension,
- each of the optical paths traversing at least two additional materials other than the core and cladding materials,
- each of the additional materials having an effective index of refraction temperature dependency which differs from those of the core and cladding materials and of the other materials,
- each of the optical paths having a respective effective optical path length which differs from that of an adjacent optical path by a respective effective optical path length difference,
- wherein the first through Q'th order derivatives with respect to temperature of each of the optical path length differences, Q>=1, are substantially equal to zero throughout a temperature range of −5 C to +70 C.
Arrayed waveguide grating apparatus having a plurality of optical paths from an input to an output, comprising a base material and a compensation region set containing at least one compensation region, the compensation region set containing at least first and second temperature compensation materials intersecting the optical paths and having effective index of refraction temperature dependencies that differ from each other and from that of the base material.
Arrayed waveguide grating apparatus having a plurality of optical paths from an input to an output, comprising a base material and a plurality of compensation regions, a first subset of at least one of the compensation regions containing a first temperature compensation material and a second subset of at least one of the compensation regions containing a second temperature compensation material, wherein the first and second temperature compensation materials have effective index of refraction temperature dependencies that differ from each other and from that of the base material.
Optical apparatus comprising an arrayed waveguide grating device, including an output port in optical communication with an input port via an arrayed waveguide grating,
- wherein the apparatus has a plurality of passbands including a subject passband, the subject passband having a center wavelength,
- and wherein the overall variation of center wavelength is less than 70 pm throughout the temperature range −50 C to +90 C.
Optical apparatus comprising an arrayed waveguide grating device, including an output port in optical communication with an input port via an arrayed waveguide grating,
- wherein the apparatus has a plurality of passbands including a subject passband, the subject passband having a center wavelength,
- and wherein the overall variation of center wavelength is less than 20 pm throughout the temperature range 0 C to +70 C.
Optical apparatus comprising a plurality of optical paths through a material system, each of the optical paths traversing a number X materials, and wherein
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Optical apparatus comprising a plurality of optical paths through a material system, each of the optical paths traversing a number X materials, and wherein
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- wherein Q>=1 and X>=3,
- wherein at least one of the materials comprises a silica, and wherein at least two of the materials each comprise a polymer.
Dependencies are inferred from the claim text.