Thermally-controlled fiber optic tuning and isolating device

• US 7,215,840 B2
• Filed: 03/23/2006
• Issued: 05/08/2007
• Est. Priority Date: 12/14/2001
• Status: Expired due to Fees

• Current Assignee: Evans & Sutherland Computer Corp. (Elevate Entertainment, Inc.)
• Original Assignee: Evans & Sutherland Computer Corp. (Elevate Entertainment, Inc.)
• Inventors: Tanner, Allen H., Marceau, David, Williams, Forrest L., Elkins, Dennis F.
• Primary Examiner(s): KIANNI, KAVEH C
• Application Number:
  US11/388,568
• Publication Number:
  US 20060165339A1
• Time in Patent Office: 411 Days
• Field of Search: 385/12, 385/13
• US Class Current: 385/12
• CPC Class Codes: G02B 6/02171 characterised by means for compensating environmentally induced changes
• CPC Class Codes: G02B 6/022 using mechanical stress, e.g. tuning by compression or elongation, special geometrical shapes such as "dog-bone" or taper G02B6/02204 takes precedence; optical modulation using photo-elastic effect G02F1/0131
• CPC Class Codes: G02F 1/0115 in optical fibres
• CPC Class Codes: G02F 1/0134 in optical waveguides
• CPC Class Codes: G02F 1/0147 based on thermo-optic effects G02F1/132 takes precedence
• CPC Class Codes: G02F 2201/307 Reflective grating, i.e. Bragg grating
• CPC Class Codes: H01S 5/0612 controlled by temperature
• CPC Class Codes: H01S 5/12 the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers comprising a photonic bandgap structure H01S5/11; surface-emitting lasers H01S5/18

Abstract

A tunable fiber optic component providing environmental isolation, thermal tuning, and mechanical tuning and a method of tuning a fiber optic component using application of substantially simultaneous varying of temperature and mechanical strain is disclosed. A method of using a tunable fiber optic component, for example, a distributed feedback fiber laser, to compensate variations in an optical system, and a method of making a tunable fiber optic component are also disclosed.

Claims

1. A tuning and isolating support device for a tunable fiber optic component comprising:

a) a thermally-conductive, acoustic-damping material defining an enclosure volume and receiving the tunable fiber optic component and configured to minimize environmental vibration effects on the fiber optic component;

b) a thermal control device in thermal contact with the thermally-conductive acoustic-damping material, wherein the thermal control device varies in temperature in response to an applied electrical signal and controls a temperature of the tunable fiber optic component so that the tunable fiber optic component optical frequency is tuned in response to the applied electrical signal; and

c) a fiber optic tension structure disposed within the enclosure volume to apply tension to the tunable fiber optic component.

2. The tuning and isolating support device of claim 1, wherein the thermal control device comprises a resistive heater wire embedded within the thermally-conductive, acoustic-damping material.

3. The tuning and isolating support device of claim 1, wherein the thermal control device is selected from the group consisting of a thermoelectric cooler, a heat pump, and a heat exchanger.

4. The tuning and isolating support device of claim 1, further comprising the tunable fiber optic component mounted within the enclosure volume.

5. The tuning and isolating support device of claim 1, further comprising:

d) wherein the fiber optic tensioning structure has at least opposing ends configured to rigidly attach to and along a common longitudinal axis with the tunable fiber optic component and formed of an electrically-active, mechanically-responsive material such that changes in dimension along the longitudinal axis arising from a first applied voltage to the tensioning structure yield corresponding dimensional changes in the tunable fiber optic component to provide tunable adjustment of an optical frequency of the tunable fiber optic component.

6. The tuning and isolating support device of claim 5, further comprising the tunable fiber optic component longitudinally mounted and rigidly attached to the tensioning structure.

7. The tuning and isolating support device of claim 6, wherein the tunable fiber optic component is rigidly attached to the tensioning structure with glue.

8. The tuning and isolating support device of claim 6, wherein the tunable fiber optic component is rigidly attached to the tensioning structure with clamps.

9. The tuning and isolating support device of claim 6, wherein the tunable fiber optic component is a distributed feedback fiber laser.

10. The tuning and isolating support device of claim 9, wherein a length of the distributed feedback fiber laser is optimally chosen to provide a particular mechanical natural frequency and optical linewidth.