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Optical modulator

A technology of modulators and optical beam splitters, applied in optics, instruments, optical components, etc., can solve the problem of increasing package size

Inactive Publication Date: 2015-08-26
OCLARO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this time the package size increases significantly due to the required interconnections between the different components

Method used

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  • Optical modulator
  • Optical modulator
  • Optical modulator

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Embodiment Construction

[0038] The inventors have realized that the folded Mach-Zehnder modulator design reduces the overall package size of the Mach-Zehnder modulator. Further, the folded design increases integration efficiency. Thus, generally disclosed herein are folded polarization multiplexer modulator devices.

[0039] The folding design disclosed herein is useful for integrating complex electro-optic devices. When multiple functions or devices are required, for example, a polarization multiplexing modulator with a VOA is required, the folded design keeps the overall element length little changed relative to a conventional layout that does not contain additional devices. while allowing such integration.

[0040] The devices disclosed herein offer the advantage of reducing the required chip area of ​​the device by at least a factor of two. Further, the apparatus disclosed herein enables removal of double-sided fiber guidance from the package by arranging the fibers on the same side.

[0041]...

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Abstract

The invention relates to a folded Mach-Zehnder modulator. The modulator may comprise a beam splitter configured to split an input light beam into a plurality of light beams. The modulator may comprise a plurality of Mach-Zehnder devices configured to receive one or more of the plurality of light beams. The modulator may comprise a U-turn section configured to receive light beams from the Mach-Zehnder devices and to change the direction of the light beams by substantially 180 degrees. The modulator may comprise a polarisation management section configured to combine light beams received from the U-turn section and to output a polarisation multiplexed phase modulated light beam.

Description

technical field [0001] The present invention relates to light modulators. More specifically, the present invention relates to folded Mach-Zehnder modulators. The invention further relates to methods and devices that can be implemented in light modulators. Background technique [0002] The term "light" in this specification will be used in a scene where its use in an optical system means not only visible light but also electromagnetic waves having wavelengths outside the range of visible light. [0003] Optical modulators and polarization multiplexing devices are complex and typically based on lithium niobate (LiNbO 3 ) substrate with a large form factor. Further, it is often required to include additional devices such as variable optical attenuators (VOA) and photodetectors (PD). The addition of such devices significantly increases the complexity and length of the overall multiplexer chip. [0004] Increased chip lengths are especially important in chip designs due to c...

Claims

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Application Information

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IPC IPC(8): H04B10/556G02F1/21
CPCG02F2001/212G02F2201/16H04B10/5053H04B10/5561G02B27/283G02F1/21G02F1/212
Inventor S·巴尔萨莫G·库斯马伊M·维拉N·雷塔尼P·韦尔加尼H·琼斯
Owner OCLARO TECH
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