Granted Patent B2

US 7,738,745 · App. 11/539,397 · Granted Jun 15, 2010

Abstract

Claims (27)

1. A method comprising:

(a) thermally biasing a first arm of a Mach-Zehnder electro-optic polymer device using an electrode; and

(b) electro-optically modulating the electro-optic polymer device by applying a high frequency signal to the first arm of the device using the same electrode.

2. A method according to claim 1 wherein the high frequency signal ranges from 1 GHz to 1 THz.

3. A method according to claim 1 wherein the high frequency signal ranges from 1 GHz to 60 GHz.

4. A method according to claim 1 wherein the electro-optic polymer device comprises a Mach-Zehnder modulator having a plurality of arms.

5. A method according to claim 4 wherein the electrode is positioned over one arm of the modulator.

6. A method according to claim 4 wherein the electrode is bifurcated and positioned over two arms of the modulator.

7. A method according to claim 1 wherein the electrode comprises gold.

8. A method according to claim 1 wherein the electrode is in a microstrip configuration.

9. A method according to claim 1 wherein the electrode forms a thermal bias circuit with a feedback loop to control the power used for thermal biasing.

10. A method according to claim 1 further comprising applying a second high frequency signal to the device using a second electrode to drive the device in a push-pull manner.

11. The method of claim 1 , wherein thermally biasing one arm of a Mach-Zehnder electro optic polymer device is performed by raising the temperature of the electrode to bias an index of refraction of the arm; and

wherein modulating the electro-optic polymer device using the same electrode is performed by modulating an electrical potential of the electrode to modulate the index of refraction of the arm.

12. An electro-optic polymer device, comprising:

two modulation channels; and

an electrode configured to apply both a thermal bias and high frequency electro-optic modulation to a first one of the light modulation channels.

13. The electro-optic polymer device of claim 12 , wherein the electrode is configured to apply electro-optic modulation to the light modulation channel having at least one frequency between 1 GHz and 1 THz.

14. The electro-optic polymer device of claim 12 , wherein the electrode is configured to apply electro-optic modulation to the light modulation channel having at least one frequency between 1 GHz and 60 GHz.

15. The electro-optic polymer device of claim 12 , wherein a second light modulation channel of the two light modulation channels is configured to cooperate with the first light modulation channel as a Mach-Zehnder modulator having a plurality of arms.

16. The electro-optic polymer device of claim 15 , wherein the electrode is positioned over one arm of the modulator.

17. The electro-optic polymer device of claim 15 , wherein the electrode is bifurcated and positioned over two arms of the modulator.

18. The electro-optic polymer device of claim 12 , wherein the electrode comprises gold.

19. The electro-optic polymer device of claim 12 , wherein the electrode is in a microstrip configuration.

20. The electro-optic polymer device of claim 12 , wherein the electrode forms a thermal bias circuit with a feedback loop to control the power used for thermal biasing.

21. The electro-optic polymer device of claim 12 , further comprising a second electrode configured to apply a second high frequency signal to the device; wherein the electrode and second electrode are configured to cooperate to drive the device in a push-pull manner.

22. The electro-optic polymer device of claim 12 , wherein the electro-optic polymer device is configured to modulate light in the first channel by modulating index of refraction responsive to an electrical potential of the electrode and to bias light in the first channel by biasing index of refraction responsive to a temperature of the electrode.

Assignments (7)