Optical Burst Switching Node with Sub-millisecond Granularity Equipped with Agile Tunable Wavelength Converter and Waveguide Amplifier

Inohara, Ryo; Nishimura, K.; Homma, Yukio; Usami, M.; Amin, Abdullah Al; Takenaka, Mitsuru; Shimizu, K.; Kagimoto, T.; Kurobe, Toshiji; Kasukawa, A.; Arimoto, Hideo; Tsuji, S.; Kondo, Yuki; Ono, Mitsufumi; Kageyama, Junichi; Sugimoto, Naoki; Ogura, I.; Hatta, Tatsuo; Onaka, H.; Nakano, Yoshiaki

doi:10.1109/ecoc.2006.4800926

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…Maximum switching speed was 13µsec which was one seventh faster than reported values measured for conventional SG-DBR lasers [3]. Recently, we have demonstrated successful optical burst switching using this proto-type module installed in 19inch luck [1] (b) Ch1 to Ch6 …”

Section: Experimental Results Of Wavelength Switchingmentioning

confidence: 71%

“…These technologies realize transparent optical routing. For the optical burst switching, agile tunable wavelength converter is indispensable to avoid burst contention in optical region [1]. For this use, tuning speed of tunable lasers should be around a few microseconds, however, commercial tunable lasers based on multi-section DBR laser can not guarantee tuning speed of sub milliseconds.…”

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confidence: 99%

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Tunable laser source for fast wavelength switching using a short-cavity DBR laser packaged with wavelength locker

Kurobe

Kimoto

Muranushi

et al. 2007

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference

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Simple switching scheme of frequency with precise feedback control of robust wavelength locker has been presented for a short-cavity DBR laser array. Switching time was less than 13 µsec within +/-2.5GHz from ITU grid. IntroductionNew network technologies such as optical packet switching and optical burst switching will be introduced to next generation network, to accommodate increasing traffic of internet services. These technologies realize transparent optical routing. For the optical burst switching, agile tunable wavelength converter is indispensable to avoid burst contention in optical region [1]. For this use, tuning speed of tunable lasers should be around a few microseconds, however, commercial tunable lasers based on multi-section DBR laser can not guarantee tuning speed of sub milliseconds. Experimentally, wavelength switching in the order of nanoseconds has been reported. under feed forward control without wavelength monitoring, however, both wavelength stability and reliability are not ensured over long period time because wavelength was affected by thermal relaxation process in the laser module. In addition, multi-section DBR lasers have been used, therefore, control circuits are considered to be rather complicated. There are only a few reports on fast wavelength locking for tunable lasers [2][3][4]. In this paper, we show simple control scheme for a stable wavelength switching by using both a short-cavity DBR tunable laser and a built-in wavelength locker packaged in a standard butterfly package, resulting in fast and stable wavelength switching time of approximately 10 microseconds. A short cavity DBR laser and integrated wavelength lockerWe have reported a short-cavity DBR tunable laser which realizes continuous wavelength tuning by changing only one DBR current without phase control. Integrating six lasers (DBR and gain sections), an MMI coupler and an SOA in one chip, continuous tuning range of 21 nm had been achieved as shown in fig. 1 [5]. Robust and compact laser module with built-in wavelength monitor was also developed [6]. In fig. 2, the laser module consists of the DBR laser array, a collimator lens, an optical isolator, a beam splitter, a Fabry-Perot etalon, and two photo-diodes. The hexagonal-shaped beam splitter splits collimated beam in three portions for wavelength monitoring, power monitoring, and fiber output. This monitor ensures the stable wavelength on the ITU grid over 30 nm. The module is potentially high-reliable packaging by the use of soldering and laser welding techniques. Dynamic switching characteristics of this module are investigated assemble onto control electronics.

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Section: Experimental Results Of Wavelength Switchingmentioning

confidence: 71%

mentioning

confidence: 99%

Tunable laser source for fast wavelength switching using a short-cavity DBR laser packaged with wavelength locker

Kurobe

Kimoto

Muranushi

et al. 2007

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference

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“…But up to now, there were problems in the speed and the scale. Recently, speed-up and improvements for large scale are achieved, therefore, the optical switching node that uses matrix optical switch and shared TWCs is developed and experimentally implemented [3]. In this method, TWCs or FWCs are not needed for the switching operation itself, and TWCs are used as devices for the contention avoidance of the light signal.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 shows an example of the target optical switching node. FDLs are newly appended to [3]. N is the number of I/O ports, W is the number of multiplexed wavelengths, T is the number of TWCs, and F is the number of FDLs.…”

Section: Introductionmentioning

confidence: 99%

Optical Switching Node with Different Shared Devices for Contention Avoidance and Its Performance

Yatsuo¹,

Tode²,

Nishimura

et al. 2007

2007 Photonics in Switching

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Optical switching node with a high-speed matrix optical switch that shares high-cost devices for contention avoidance, i.e. tunable wavelength converters (TWCs) or fiber delay lines (FDLs), is developed. However, a quantitative performance hadn't been evaluated enough so far since mainly small-scale prototype switch was developed and the operation verification by the basic experiment was done. In this paper, the switching behavior on a switching node that shares both TWCs and FDLs for contention avoidance is newly established and its performance is evaluated by using computer simulations. Finally, effective composition of both devices for contention avoidance is examined.

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Development of an Optical-Burst Switching Node Testbed and Demonstration of Multibit Rate Optical Burst Forwarding

Amin

Nishimura

Shimizu

et al. 2009

J. Lightwave Technol.

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Optical Burst Switching Node with Sub-millisecond Granularity Equipped with Agile Tunable Wavelength Converter and Waveguide Amplifier

Cited by 6 publications

References 2 publications

Tunable laser source for fast wavelength switching using a short-cavity DBR laser packaged with wavelength locker

Tunable laser source for fast wavelength switching using a short-cavity DBR laser packaged with wavelength locker

Optical Switching Node with Different Shared Devices for Contention Avoidance and Its Performance

Development of an Optical-Burst Switching Node Testbed and Demonstration of Multibit Rate Optical Burst Forwarding

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