Low-cost tunable dfb semiconductor laser with integrated modulator and its preparation method

A technology for tuning lasers and modulators, which is applied in the field of optoelectronics, can solve the problems of not being able to achieve a high direct tuning rate and weaken the advantages of tunable solutions, and achieve the effects of simplifying packaging structure design, easy packaging, and reducing complexity and cost

Active Publication Date: 2018-08-31
南京华飞光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, direct modulation of lasers generally cannot achieve a very high direct modulation rate, and the direct modulation rate of 10Gb / s must be well optimized, and the packaging of multi-port high-speed modulation is not only domestic, but even abroad These are technical problems that are difficult to solve, and these problems will greatly weaken the advantages of the tunable solution

Method used

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  • Low-cost tunable dfb semiconductor laser with integrated modulator and its preparation method
  • Low-cost tunable dfb semiconductor laser with integrated modulator and its preparation method
  • Low-cost tunable dfb semiconductor laser with integrated modulator and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] [Example 1] The working wavelength is 1555 ~ 1561nm based on the same epitaxial structure integrated SOA modulator four-section series tunable DFB semiconductor laser (such as figure 1 shown):

[0035] First, design and manufacture the photolithography plate according to the process steps. The process flow of manufacturing DFB semiconductor lasers based on the reconstruction-equivalent chirp technology is one step more than the standard process flow. The second exposure process of the seed grating, the second Exposure is achieved by sampling a raster plate. The equivalent pi phase shift is introduced by adding a mutation of half the sampling period in the middle of the uniform sampling grating, so as to produce a DFB semiconductor laser with an equivalent pi phase shift. The different lasing wavelengths of the laser are realized by changing the sampling period. The design makes three lasers The lasing wavelengths are 1555nm, 1558nm and 1561nm respectively (the specific...

Embodiment 2

[0042] [Example 2] The four-section series-connected tunable DFB semiconductor laser (such as figure 2 shown, produced by SAG technology):

[0043] First, design and manufacture the photolithography plate according to the process steps. The process flow of manufacturing DFB semiconductor lasers based on the reconstruction-equivalent chirp technology is one step more than the standard process flow. The second exposure process of the seed grating, the second Exposure is achieved by sampling a raster plate. The equivalent pi phase shift is introduced by adding a mutation of half the sampling period in the middle of the uniform sampling grating, so as to produce a DFB semiconductor laser with an equivalent pi phase shift. The different lasing wavelengths of the laser are realized by changing the sampling period. The design makes three lasers The lasing wavelengths are 1555nm, 1558nm and 1561nm respectively (the specific arrangement order can be optimized according to the situati...

Embodiment 3

[0050] [Example 3] The tunable DFB semiconductor laser (such as the tunable DFB semiconductor laser with an integrated EAM modulator and coupled through a passive Y-branch waveguide) with an operating wavelength of 1544 to 1559 nm Figure 4 As shown, the blue shift of the PL spectrum is produced by the QWI technique):

[0051] First, design and manufacture the photolithography plate according to the process steps. The process flow of manufacturing DFB semiconductor lasers based on the reconstruction-equivalent chirp technology is one step more than the standard process flow. The second exposure process of the seed grating, the second Exposure is achieved by sampling a raster plate. The equivalent pi phase shift is introduced by adding a mutation of half the sampling period in the middle of the uniform sampling grating, so as to produce a DFB semiconductor laser with an equivalent pi phase shift. The different lasing wavelengths of the laser are realized by changing the samplin...

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Abstract

A low-cost tunable DFB semiconductor laser with an integrated modulator. The tunable scheme of DFB semiconductor laser is produced by reconstruction-equivalent chirp technology. Multiple DFB semiconductor lasers share a modulator, and can be increased by increasing the number of lasers or active The passive integration method extends the tunable wavelength range; the integrated modulator is a semiconductor optical amplifier modulator (SOA), an electro-absorption modulator (EAM) or a Mach-Zehnder modulator (MZM); it can be achieved by quantum well hybrid technology (QWI), butt-joint growth technology (Butt-joint) or selective area growth technology (SAG), in which the quantum well material is based on the InP / InGaAsP or InP / AlGaInAs material system. The invention only needs at least one radio frequency port for modulation, thereby reducing the cost by simplifying the packaging design, and greatly improving the practicability and ease of use.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and is related to the distributed feedback semiconductor laser of the integrated modulator, in particular to the design and manufacture of the complex distributed feedback tunable semiconductor laser, more specifically, the integrated modulator based on reconstruction-equivalent chirp A low-cost tunable distributed feedback semiconductor laser method and device for the technology. Background technique [0002] In modern DWDM wavelength division multiplexing systems, wavelength-selectable light sources have always played an important role in optical transmission systems as key components, and tunable lasers can greatly increase the flexibility of network deployment due to their optional wavelength characteristics , and reduce the energy consumption and maintenance cost of the system, therefore, the research and development of tunable lasers has been concerned by research institutes and maj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/06H01S5/12H01S5/40
CPCH01S5/06258H01S5/0265H01S5/0287H01S5/0612H01S5/1209H01S5/1215H01S5/124H01S5/4031H01S5/4087H01S5/5027
Inventor 唐松李连艳陈向飞
Owner 南京华飞光电科技有限公司
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