Resonant coupling of optical signals for out-of-plane transmission that includes output beam modification

Inactive Publication Date: 2006-03-23
AVAGO TECH WIRELESS IP SINGAPORE PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003] An optical system includes an optically resonant system formed in a planar substrate to emit a resonant optical signal in an out-of-plane direction relative to the substrate and an optical structure formed on a surface of the optically resonant system to modify a characteristic of an emitted resonant signal. For example, the optical structure is a dielectric layer that is configured to impart a p

Problems solved by technology

However, it can be difficult to efficiently couple an optical signal out of a planar waveguide in an out-of-plane direction for either free space transmission or, more typically, for coupling to an optical fiber.
Additionally, an optical signal that is extracted out of a planar substrate in an out-of-plane direction has mode properties that are dependent upon the particular architecture of the extraction system and the mode properties may not be entirely compatible with the desired application.
However, size and alignment limitations of bulk optical elements can make their use with integrated optical elements problematic.

Method used

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  • Resonant coupling of optical signals for out-of-plane transmission that includes output beam modification
  • Resonant coupling of optical signals for out-of-plane transmission that includes output beam modification
  • Resonant coupling of optical signals for out-of-plane transmission that includes output beam modification

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Embodiment Construction

[0023] The invention is described with reference to the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are intended to convey the scope of the invention to those skilled in the art. Furthermore, all “examples” given herein are intended to be non-limiting.

[0024] Referring now to FIG. 1, an optical input signal 100 is provided to an optically resonant system 101. The optically resonant system 101 captures energy of the optical input signal 100 through resonant characteristics of the optically resonant system 101. The optically resonant system 101 then emits an optical output signal 102. By way of example, the optical output signal could be emitted orthogonal to the optical input signal 100.

[0025] The optical input signal 100 in different embodiments could be travelling in a number of different media, including an optical fiber waveguide, a die...

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Abstract

An optical structure is formed on a surface of the optically resonant system to modify a characteristic of the emitted resonant signal. The optical structure may be configured to impart a phase-shift on a portion of the resonant signal. Because the resonant signal consists of a single resonant mode with an axially symmetric radiation pattern, a phase-shift can be used to, for example, collimate, disperse, direct, and generally shape output characteristics of the emitted resonant signal. The optical structure can also be used to tune the quality factor (Q) of the optically resonant system.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is related to U.S. patent application Ser. No. 10 / 123,656, filed Apr. 16, 2002 and entitled RESONANT COUPLING OF OPTICAL SIGNALS FOR OUT-OF-PLANE TRANSMISSION.BACKGROUND OF THE INVENTION [0002] Nanoscale integrated optical devices are rapidly achieving signal generation and processing functionality previously restricted to the purely electronic domain. These nanoscale devices, which are typically planar, normally include a planar waveguide supported by a substrate with the planar waveguide confining light in the substrate. However, it can be difficult to efficiently couple an optical signal out of a planar waveguide in an out-of-plane direction for either free space transmission or, more typically, for coupling to an optical fiber. Additionally, an optical signal that is extracted out of a planar substrate in an out-of-plane direction has mode properties that are dependent upon the particular architecture of the extracti...

Claims

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Application Information

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IPC IPC(8): G02B6/26
CPCG02B6/12004G02B2006/12107G02B6/42G02B6/124
InventorFLORY, CURT ALAN
OwnerAVAGO TECH WIRELESS IP SINGAPORE PTE