Generation of RZ-AMI using a Widely Tuneable Modulated Grating Y-Branch Chirp Managed Laser

Zheng, Xuqiang; Mahgerefteh, Daniel; Matsui, Yasuhiro; Bu, Vincent; McCallion, K.; Xu, Haitao; Deutsch, Michael; Ereifej, H.; Lewén, R.; Wesstrom, J.-O.; Schatz, Richard; Rigole, P.-J.

doi:10.1364/ofc.2010.othe5

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Different directly modulated lasers are used as sources, such as DFB laser [9], tunable modulated-grating Y-branch (MG-Y) lasers [10], DFB laser array [11] and DBR laser [12]. Meanwhile, multi-cavity thin-film filters [13], ring-based filters [14], and optical delay line interferometers [15] are employed as an OSR filter to implement the frequency modulation (FM) to amplitude modulation (AM) conversion to increase the extinction ratio (ER), thereby increasing the dispersion tolerance. Recently, a monolithically integrated CML based on slanted trenches has also been proposed [16].…”

Section: Introductionmentioning

confidence: 99%

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

Zhu

Feng

et al. 2018

IEEE Photonics J.

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In this paper, a novel tunable DBR laser based on novel cascaded gratings is proposed for chirp management in high-speed direct modulation applications. The cascaded gratings, i.e., a tilted π phase-shift grating followed by a normal uniform Bragg grating, can provide a narrow-band reflection spectrum with a sharp falling slope on the longer wavelength side, so that the optical spectrum shaping and the detuned-loading effects can be enhanced. Simulation results indicate that the wavelength tuning range of the laser is about 10 nm and the 3-dB modulation bandwidth reaches up to 25 GHz. By simply adjusting the phase current and thus changing the detuned frequency, the extinction ratio and the frequency chirp can be optimized, which is helpful to improve the dispersion tolerance and reduce the dispersion power penalty.

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Section: Introductionmentioning

confidence: 99%

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

Zhu

Feng

et al. 2018

IEEE Photonics J.

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“…In this letter, we demonstrate a cost-effective approach to generate high-speed RZ optical pulses using a single chirp managed laser (CML), which integrates a directly modulated distributed feedback (DFB) laser (DML) and a DI periodic filter in a single laser package [4], without any external modulator for pulse carving, for metro or access network. Both 33%-duty-cycle and 67%-duty-cycle RZ optical pulses have been generated simultaneously at the two output ports of the DI in the CML.…”

Section: Introductionmentioning

confidence: 99%

Generation of Return-to-Zero Optical Pulses Using Directly Modulated Chirp Managed Laser

Jia

Chan

2012

IEEE Photon. Technol. Lett.

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We propose and experimentally demonstrate the generation of return-to-zero (RZ) optical pulses with duty cycles of 33% and 67% using a directly modulated chirp managed laser (CML) driven by a sinusoidal signal at half pulse rate. No external pulse carver is required. The transmission performance of a 10-Gb/s RZ differential phase-shift keying (RZ-DPSK) signal based on CML pulses is also investigated. It shows comparable fiber chromatic dispersion tolerance and fiber nonlinearity robustness in single-channel test, compared with the conventional RZ-DPSK signal generated, via an external pulse carver.Index Terms-Chirp managed laser (CML), direct modulation, return-to-zero (RZ) pulse.

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“…The demand for capacity will probably be satisfied, at least in part, through the use of multi-level spectrally-efficient modulation formats such as quadrature amplitude modulation (QAM). However, these signaling schemes require sophisticated coherent receivers for detection, and as a result interest still remains in advanced OOK formats which can provide superior transmission performance while taking advantage of simpler direct detection receivers [2]. One such modulation format is alternate mark inversion (AMI) where OOK pulses, typically return-to-zero (RZ), are also phase modulated so that each pulse is phase-inverted with respect to its neighboring pulses [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…However, these signaling schemes require sophisticated coherent receivers for detection, and as a result interest still remains in advanced OOK formats which can provide superior transmission performance while taking advantage of simpler direct detection receivers [2]. One such modulation format is alternate mark inversion (AMI) where OOK pulses, typically return-to-zero (RZ), are also phase modulated so that each pulse is phase-inverted with respect to its neighboring pulses [1,2]. AMI differs from phase-shift keying in that information is not conveyed by the phase, but rather through the amplitude modulation.…”

Section: Introductionmentioning

confidence: 99%

All-optical technique for modulation format conversion from on-off-keying to alternate-mark-inversion

Dailey¹,

Webb²,

Manning³

2010

Opt. Express

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Access to the full text of the published version may require a subscription. Abstract: We propose and numerically investigate for the first time a novel all-optical on-off-keying to alternate-mark-inversion modulation format converter operating at 40 Gbps employing a semiconductor optical amplifier (SOA)-based Mach-Zehnder interferometer (MZI). We demonstrate that this SOA-MZI operates as a pulse subtractor, and in the absence of patterning will produce perfectly phase inverted pulses regardless of the individual SOA phase excursions. RightsWe use a comprehensive computer model to illustrate the impact of patterning on the output phase modulation which is quantified through the definition of the phase compression factor.

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Generation of RZ-AMI using a Widely Tuneable Modulated Grating Y-Branch Chirp Managed Laser

Cited by 4 publications

References 2 publications

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

A Chirp-Managed Tunable DBR Laser Based on Novel Cascaded Gratings

Generation of Return-to-Zero Optical Pulses Using Directly Modulated Chirp Managed Laser

All-optical technique for modulation format conversion from on-off-keying to alternate-mark-inversion

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