Athermalized codoped optical waveguide device
AssigneeCorning Incorporated
InventorsGeorge Edward Berkey, Lisa Wan-I Liou, Robert Adam Modavis, Daniel Aloysius Nolan, David Lee Weidman
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Abstract
Athermalized optical waveguide devices and methods of making the athermalized devices are described. Boron is incorporated into the composition of the optical waveguides in order to athermalize the waveguides by reducing spectral shifts caused by changes in temperature. The invention includes the utilization of boron dopants in the core and cladding of optical waveguide devices such as Mach-Zehnder coupler devices and long period fiber gratings.
Claims30
An optical waveguide device comprised of an optical fiber which includes waveguiding silica core doped with an index raising dopant, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device, such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04.
An optical waveguide device comprising an optical waveguiding silica core doped with an index raising dopent, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04, and wherein said waveguide device comprises a transmitting filter.
An optical waveguide device comprising an optical waveguiding silica core doped with an index raising dopent, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04, wherein a mode guided by said waveguiding core is coupled to a second waveguiding core.
An optical waveguide device comprising an optical waveguiding silica core doped with an index raising dopant, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device, and a cladding, wherein a mode propagating in said core is coupled to a mode in said cladding.
An athermalized optical waveguide device comprising an optical waveguiding silica core doped with an index raising dopent, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04, wherein said index raising dopant comprises GeO2, wherein said silica core has a B2O3:GeO2 ratio ranging from
- 1 wt. % B2O3:3 wt. % GeO2 to
- 1 wt. % B2O3:10 wt. % GeO2.
An optical waveguide device comprising an optical waveguiding silica core doped with an index raising dopant comprising GeO2, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04, and wherein said silica core has a B2O3:GeO2 ratio ranging from
- 1 wt. % B2O3:4 wt. % GeO2 to
- 1 wt. % B2O3:6 wt. % GeO2.
An optical waveguide device comprising an optical waveguiding silica core doped with an index raising dopant, wherein said waveguiding core is codoped with a sufficient amount of B2O3 to inhibit thermal spectral shifts in the device caused by a change in the temperature of said device, wherein said index raising dopant is GeO2, and wherein said silica core has a B2O3:GeO2 ratio of 1 wt. % B2O3:5 wt. % GeO2.
An athermalized optical waveguide fiber compromised of a silica glass with:
- (i) a dopant content compromised of B2O3 in an amount sufficient to inhibit thermal spectral shifts in the device caused by change in the temperatures of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04;
- and
- (ii) a plurality of index raising dopant molecules.
An athermalized optical waveguide comprising a silica glass with a dopant content comprised of B2O3 and a plurality of index raising dopant molecules, wherein said dopant content has a B2O3:index raising dopant molar ratio ranging from 1 mole B2O3:3 moles of index raising dopant molecules to 1 mole B2O3:4 moles of index raising dopant molecules.
An athermalized an optical waveguide device compromised of fiber which includes:
- a silica glass core with a dopant content consisting essentially of GeO2 and B2O3 in an amount sufficient to inhibit thermal spectral shifts in the device caused by change in the temperatures of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04.
A method of athermalized an optical waveguide compromising an optical fiber to inhibit thermal spectral shifts, said method comprising:
- (a) forming a silica waveguide fiber core;
- (b) doping said silica waveguide fiber core with GeO2;
- and
- (c) codoping said silica waveguide fiber core with B2O3 in an amount sufficient to inhibit thermal spectral shifts in the device caused by change in the temperatures of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04.
A method of athermalizing an optical waveguide device to inhibit thermal spectral shifts, said method comprising:
- (a) forming a silica waveguide core;
- (b) doping said silica waveguide core with GeO21, and
- (c) codoping said silica waveguide core with B2O3 in an amount sufficient to inhibit thermal spectral shifts in the device caused by change in the temperatures of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04, and
- (d) forming a Mach-Zender interferometer with sadi codoped silica waveguide core.
A method of athermalizing an optical waveguide device to inhibit thermal spectral shifts, said method comprising:
- (a) forming a silica waveguide core;
- (b) doping said silica waveguide core with GeO21;
- (c) codoping said silica waveguide core with B2O3 in an amount sufficient to inhibit thermal spectral shifts in the device caused by change in the temperatures of said device such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04;
- (d) cladding said codoped waveguide core to form an optical waveguide;
- and
- (e) writing a log period grating in said formed optical waveguide.
A method of reducing the temperature dependence of an optical waveguide device comprising an optical fiber, said method comprising:
- (a) forming a waveguide core;
- (b) doping the waveguide core with an index raising dopant having a positive thermal spectral shift slope;
- (c) codoping said waveguide core with a second dopant having a negative thermal spectral shift slope such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04;
- (d) cladding said waveguide core;
- and
- (e) fabricating an optical waveguide fiber device from said cladded codoped waveguide core.
A method of reducing the temperature dependence of an optical waveguide device, said method comprising:
- (a) forming a waveguide core;
- (b) doping the waveguide core with an index raising dopant having a positive thermal spectral shift slope;
- (c) codoping said waveguide core with a second dopant having a negative thermal spectral shift slope;
- (d) cladding said waveguide core;
- and
- (e) fabricating an optical waveguide device from said cladded codoped waveguide core, wherein said step of codoping said waveguide core with a second dopant comprises the step of codoping with an amount of said second dopant so that the molar ratio of said second dopant to said index raising dopant is in the range of 1 mole of said second dopant to 2-4 moles of said index raising dopant.
A method of making an optical device which includes a fiber reduced temperature dependence, said method comprising:
- (a) doping a fiber waveguide with an index altering dopant which allows light to be guided;
- and
- (b) doping the fiber waveguide with a temperature dependence liberating dopant which reduces the temperature dependence of the fiber waveguide such that the average thermal slope Δλ(nm)/ΔT(° C.) is less than 0.04.
Dependencies are inferred from the claim text.