1. A method comprising:
using an arrayed waveguide grating to act as a transversal filter to compensate for dispersion in an optical device.
2. The method of claim 1 including using a planar lightwave circuit acting as a transversal filter.
3. The method of claim 1 including adjusting the length of an array of waveguides to compensate for dispersion.
4. The method of claim 1 including adjusting the length of a waveguide to alter the phase of a signal.
5. The method of claim 1 including adjusting power coupling to control the amplitude of a signal.
6. The method of claim 4 including varying the lengths between said waveguides.
7. The method of claim 6 including varying the lengths between said waveguides as a function of the effective index of the waveguides.
8. The method of claim 6 including heating at least one of said arrayed waveguides.
9. The method of claim 6 including adjusting for sub-wavelength path differences.
10. An optical device comprising:
an optical element subject to dispersion; and
an arrayed waveguide grating that acts as a dispersion compensating transversal filter coupled to said element to compensate for dispersion of said element.
11. The device of claim 10 wherein said transversal filter is formed as a planar lightwave circuit.
12. The device of claim 10 wherein the lengths of the array of waveguides in said arrayed waveguide grating are adjusted to compensate for dispersion.
13. The device of claim 12 wherein the lengths of the array of waveguides are adjusted to alter the phase of a signal.
14. The device of claim 12 including a heater to heat at least one of said waveguides.
15. An optical device comprising:
a substrate; and
an arrayed waveguide grating formed in said substrate, said waveguide grating including a pair of couplers and a waveguide region including a plurality of waveguides, the lengths of said waveguide gratings being adjusted to compensate for dispersion of a signal incident to said device.
16. The device of claim 15 wherein the lengths of said waveguide gratings are adjusted to alter the phase of the signal incident to said device.
17. The device of claim 15 including a heater to heat at least one of said waveguide gratings.
18. The device of claim 17 including a heater for each of said waveguide gratings.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A sand bottle assembly on a golf car comprising:
a bottle defined by a longitudinal hollow body having an outer periphery, the bottle defining an opening formed thereon, the bottle having an extension portion extending parallel to the longitudinal hollow body and outside of the outer periphery, the extension portion defining a cavity for receiving sand;
a first engaging portion defined on the bottle;
a mounting bracket adapted to be connected to the golf car and receive the bottle in an installed position; and
a second engaging portion defined on the mounting bracket adapted to slidably receive and retain the first engaging portion of the bottle in an interference fit.
2. The sand bottle assembly of claim 1 wherein the second engaging portion includes an annular protrusion on the mounting bracket.
3. The sand bottle assembly of claim 2 wherein the first engaging portion includes a raised sidewall extending generally transverse to a longitudinal axis of the hollow body and extending beyond the outer periphery of the longitudinal hollow body, the raised sidewall having a leading and trailing edge, wherein the raised sidewall urges the annular protrusion outwardly during advancement of the bottle to the installed position.
4. The sand bottle of claim 3 wherein the annular protrusion of the mounting bracket contacts the trailing edge in the installed position.
5. A sand bottle assembly on a golf car comprising:
a bottle defined by a longitudinal hollow body having an opening formed thereon;
an extension portion defining a longitudinal member extending generally parallel to an axis defined by the longitudinal hollow body of the bottle, the longitudinal member extending from a first end to a second end;
a raised sidewall portion that extends beyond the longitudinal hollow body;
a mounting bracket adapted to be connected to the golf car and receive the bottle in an installed position; and
an engaging portion formed on the mounting bracket adapted to engage and bottle in a secure position.
6. The sand bottle assembly of claim 5 wherein the raised sidewall portion creates an interference fit with the engaging portion of the mounting bracket in the installed position.
7. The sand bottle of claim 6 wherein the raised sidewall defines a leading edge and a trailing edge and wherein the engaging portion of the mounting bracket contacts the trailing edge in the installed position.
8. A sand bottle assembly on a golf car comprising:
a bottle defined by a longitudinal hollow body having a bottom portion and a top portion, the longitudinal hollow body defining a vertical axis;
a spout formed at the top portion and adapted to dispense sand contained in the hollow body;
an extension portion disposed along a sidewall of the hollow body and defining a longitudinal member extending generally parallel to the vertical axis, the longitudinal member extending from a sloped section formed at a first end to a second end, the extension portion having an engaging portion; and
a mounting bracket adapted to be connected to the golf car and matingly receive the engaging portion of the bottle in an installed position, wherein the mounting bracket defines an annular protrusion adapted to engage and retain the engaging portion of the extension portion in a secure position along the vertical axis in the installed position, the mounting bracket including an upper ring surrounding the upper portion of the bottle in the installed position and a lower ring surrounding the bottom portion of the bottle in the installed position.
9. The sand bottle of claim 8 wherein the longitudinal member generally defines a radial profile in a plane transverse to the vertical axis.
10. The sand bottle of claim 9 wherein the longitudinal member extends from a first end at an upper portion of the bottle to a second end at an intermediate portion of the bottle, wherein the second end of the longitudinal member is offset from the bottom portion of the bottle.
11. The sand bottle of claim 10 wherein the engaging portion includes a raised sidewall portion that is formed at the second end of the longitudinal member.
12. The sand bottle of claim 11 wherein the raised sidewall portion creates an interference fit with the engaging portion of the mounting bracket in the installed position.
13. The sand bottle of claim 12 wherein the raised sidewall portion defines a leading edge and a trailing edge and wherein the engaging portion of the mounting bracket contacts the trailing edge in the installed position.
14. The sand bottle of claim 13 wherein the mounting bracket generally defines a u-channel and wherein the annular protrusion is formed thereon.
15. The sand bottle of claim 12 wherein the mounting bracket is operable to slidably receive the raised sidewall portion in a secure position as the bottle is advanced in a direction along the vertical axis.
16. The sand bottle assembly of claim 11 wherein the raised sidewall portion defines a first width and the engaging portion defines a second width, the first width being greater than the second width while the bottle is retained in the secure position.