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Directly modulated laser with integrated optical filter

A technology of filters and lasers, applied in electromagnetic transmitters, electromagnetic wave transmission systems, electrical components, etc., can solve the problem of high cost

Inactive Publication Date: 2012-12-12
FINISAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution of using external optical filters with the DML is still costly to implement due to the complex packaging of the system and the additional equipment and electronic control

Method used

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  • Directly modulated laser with integrated optical filter
  • Directly modulated laser with integrated optical filter
  • Directly modulated laser with integrated optical filter

Examples

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Embodiment Construction

[0017] The example embodiments described herein involve light sources that include directly modulated lasers ("DML") with filters integrated on a common substrate. DML can be DBR, DFB or FP laser. In one embodiment, the filter includes a p-type cladding layer, an active region, and an n-type cladding layer. In some embodiments, the filter is grown epitaxially on the same substrate where the DML is located, and the DML is also grown at the same time. In other embodiments, the filter is grown on the same substrate where the DML is located in the subsequent regrowth process.

[0018] As mentioned earlier, the DML is modulated in the working process, so that the DML produces chirp in the output signal. The integrated filter converts the chirp signal into an amplitude and / or phase modulation signal with a relatively narrow line width. The amplitude and / or phase modulated signal can propagate long distances in the optical fiber with little or no signal dispersion.

[0019] I. Sample...

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PUM

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Abstract

An integrated optical source includes a Directly Modulated Laser (DML) and a filter which is positioned with the DML on a common substrate. The filter is configured to receive an input signal in the form of a modulated chirped optical signal. The filter is further configured to provide an output optical signal in the form of an amplitude and / or phase modulated optical signal, optimized for long-distance transmission in optical fiber.

Description

Technical field [0001] The present invention relates to a directly modulated laser (DML). More specifically, embodiments of the present invention relate to DML with integrated optical filters. Background technique [0002] Computing and networking technologies have changed the world. As the amount of information transmitted over the network increases, high-speed data transmission has become more critical. Due to the large bandwidth of optical fibers and the ability of optical fibers to handle high-speed data transmission, many high-speed data transmission networks rely on optical networks. Therefore, fiber optic networks can be seen everywhere in a wide range of high-speed applications ranging from limited small local area networks (LANs) to networks that form the backbone of the Internet. [0003] Generally, data transmission in such a network is implemented in part by using optical transmitters such as lasers. The light emitter emits light in response to the driving current, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/00
CPCH04B10/548H04B10/504H04B10/54
Inventor 邓宏煜尤里·万德舍夫
Owner FINISAR