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Wideband optical modulator with polymer waveguide and drive amplifier integrated on flexible substrate

A modulator, polymer technology, used in nonlinear optics, instrumentation, optics, etc.

Inactive Publication Date: 2008-01-02
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recent devices have modest drive requirements of 8-12 volts, but still require an external RF power amplifier to operate

Method used

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  • Wideband optical modulator with polymer waveguide and drive amplifier integrated on flexible substrate
  • Wideband optical modulator with polymer waveguide and drive amplifier integrated on flexible substrate
  • Wideband optical modulator with polymer waveguide and drive amplifier integrated on flexible substrate

Examples

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Embodiment Construction

[0019] Referring to FIG. 1 , an integrated optoelectronic circuit is indicated generally at 100 . The optoelectronic circuit 100 includes an electro-optic device such as a Mach-Zehnder interferometer (MZI) 104 , or an electro-absorption modulator that receives an optical signal 120 . A monolithic microwave integrated circuit (MMIC) 102 is coupled to a polymer-based MZI 104 via a pair of electrodes 128 , 130 and an output transmission line 124 and a ground signal return transmission line 126 . These transmission lines have the properties of microstrip transmission lines. Electrode 130 is a ground electrode and electrode 128 is a radio frequency (RF) or signal electrode (eg, a microstrip transmission line). MMIC 102 receives radio frequency modulation signal 132, which is used to modulate optical signal 120 in MZI 104, thereby providing modulated optical signal 122 as output. Examples of suitable organic substances in the MZI include polyacrylates; polyalkylmethacrylates, such...

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PUM

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Abstract

The invention comprises a novel combination of microwave and photonic packaging to arrive a compact, self contained MZI modulator. The nature of the NLO polymer, that is, its large electro-optic coefficient reduces the drive requirements for the integrated power amplifier (202), allowing a small to medium power amplifier to be used. Microwave high density interconnect (HDI) pakcaging techniques allow the medium power amplifier to be fabricated into a small assembly, which can be mounted directly to the MZI substrate. The integrated amplifier and modulator provides a significant reduced size and lower power, and high bandwidth advantage when compared with existing devices based on inorganic materials.

Description

background of the invention [0001] This disclosure relates to an optoelectronic circuit, in particular to a combination of microwave and photonic components of a small, self-contained Mach-Zehnder interferometer (MZI) modulator. [0002] Modulation of optical signals at microwave frequencies typically greater than 10 GHz requires external modulation of the laser source to prevent inadvertent modulation of the laser frequency (eg chirping). For this purpose, Mach-Zehnder interferometer structures are often employed to generate optical phase and / or amplitude modulators. One or both arms of a Mach-Zehnder interferometer contain multiple electrodes to allow phase modulation of an optical signal through the electro-optic effect. These electrodes require a driver amplifier to provide the proper electric field to generate the electro-optic effect. The amplifier needs sufficient bandwidth and output capability to drive the reactive load presented by the Mach-Zehnder electrodes. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/225G02F1/01G02F1/065
CPCG02F1/225G02F1/0121G02F1/065
Inventor W·P·科恩伦普夫G·克莱东S·达斯古普塔R·菲尔金斯G·福曼J·扬诺蒂M·C·尼尔森
Owner GENERAL ELECTRIC CO
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