Time-domain interleaving technique for wavelength-swept light based super dense WDM transmitter

Taniguchi, Tomohiro; Sakurai, Nozomu; Kimura, Hirokazu; Kumozaki, Kiyomi

doi:10.1049/el.2009.0258

Cited by 2 publications

(4 citation statements)

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“…The conventional method which uses many separate laser diodes needs bulky volume and consumes a lot of power . There are also some other methods based on wavelength‐swept light source, which can be combined with time‐domain interleaving technique to increase transmission rate .…”

Section: Introductionmentioning

confidence: 99%

A high‐denseWDMlight source based on mixing‐modulatedFabry–Perot laser diodes

Zhu

Liu

2014

Micro & Optical Tech Letters

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A scheme of high‐dense wavelength‐division‐multiplexing light source based on external mixing‐modulated Fabry–Perot laser diode (FP‐LD) is investigated in this article. A 10‐GHz spaced 22‐channel optical carrier supply module is achieved by cascading a multiple‐longitudinal mode FP‐LD with two types of external modulators. Then a 110‐channel extendable light source scheme is proposed. This scheme has potential application prospect in future optical access network. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:403–406, 2015

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Section: Introductionmentioning

confidence: 99%

A high‐denseWDMlight source based on mixing‐modulatedFabry–Perot laser diodes

Zhu

Liu

2014

Micro & Optical Tech Letters

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“…For such SD-WDM access systems, a key technology is a multi-wavelength optical transmitter, which generates plural wavelength channels and precisely locks the wavelength channel spacing. As a promising solution, we have already proposed a multiwavelength optical transmitter based on the time-domain modulation of a wavelength-swept light [2,3]. With this technique, we can realise a WDM signal with a super-dense grid, e.g.…”

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confidence: 99%

“…around 0.1 nm (12.5 GHz in the 1550 nm band), using only a single light source and a modulator. In [2,3], we demonstrated the generation and selective detection of a four-channel 1.25/2.5 Gbit/s SD-WDM signal with a direct detection scheme.In this Letter, we propose a spectrum shaping technique to apply heterodyne detection to the receiving sides. Heterodyne detection is a coherent detection method which offers the advantages of high sensitivity and fine wavelength selectivity compared with a direct detection scheme, and is expected to be a key technology in future fibre-optic networks including access areas [4,5].…”

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Heterodyne detection of wavelength-swept super-dense WDM signal employing spectrum shaping

et al. 2009

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A spectrum shaping technique is proposed for a previously proposed wavelength-swept wavelength division multiplexing (WDM) transmitter to allow it to be employed for heterodyne detection in the receiver side. With this technique, image rejection for all channels is performed on the transmitting side using a single optical periodic filter, therefore image-induced crosstalk can be suppressed. Furthermore, the selective heterodyne detection of a multi-channel 1.0 Gbit/s/ch super-dense WDM is demonstrated using a 12.5 GHz MZI filter as the spectrum shaping filter.Introduction: Wavelength division multiplexing (WDM) is a promising technique for meeting the growing demand for increased bandwidth and various types of services in the optical access network. In future access networks (especially with regards to downlinks), we require techniques for super-dense WDM (SD-WDM) [1] so that we can provide attractive additional services, such as high-quality video distribution or ondemand services, within the narrow spectral range unoccupied by existing access systems. For such SD-WDM access systems, a key technology is a multi-wavelength optical transmitter, which generates plural wavelength channels and precisely locks the wavelength channel spacing. As a promising solution, we have already proposed a multiwavelength optical transmitter based on the time-domain modulation of a wavelength-swept light [2,3]. With this technique, we can realise a WDM signal with a super-dense grid, e.g. around 0.1 nm (12.5 GHz in the 1550 nm band), using only a single light source and a modulator. In [2,3], we demonstrated the generation and selective detection of a four-channel 1.25/2.5 Gbit/s SD-WDM signal with a direct detection scheme.In this Letter, we propose a spectrum shaping technique to apply heterodyne detection to the receiving sides. Heterodyne detection is a coherent detection method which offers the advantages of high sensitivity and fine wavelength selectivity compared with a direct detection scheme, and is expected to be a key technology in future fibre-optic networks including access areas [4,5]. Since heterodyne detection requires no phase synchronisation between the signal and the local light, the approach is easier to implement than homodyne detection. However, since there is a problem with respect to image-induced crosstalk [6], an image rejection operation is needed in all channels to achieve sufficient reception quality. With the proposal, the image rejection of all the channels is performed on the transmitting side using a single optical periodic filter. As proof of concept, we demonstrate the selective heterodyne detection of multi-channel 1.0 Gbit/s/ch SD-WDM with a 12.5 GHz spacing.

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Time-domain interleaving technique for wavelength-swept light based super dense WDM transmitter

Cited by 2 publications

References 3 publications

A high‐denseWDMlight source based on mixing‐modulatedFabry–Perot laser diodes

A high‐denseWDMlight source based on mixing‐modulatedFabry–Perot laser diodes

Heterodyne detection of wavelength-swept super-dense WDM signal employing spectrum shaping

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