High power and widely tunable Si hybrid external-cavity laser for power efficient Si photonics WDM links

Lee, Jin Hyoung; Shubin, Ivan; Yao, Jin; Bickford, Justin R.; Luo, Ying; Lin, Shiwei; Djordjevic, Stevan S.; Thacker, Hiren; Cunningham, J. E.; Raj, Kannan; Zheng, Xuezhe; Krishnamoorthy, Ashok V.

doi:10.1364/oe.22.007678

Cited by 55 publications

(32 citation statements)

References 16 publications

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“…While RRMs suffer from a requirement to be tightly thermally stabilized leading to excess power consumption [25], any type of WDM system requires some form of temperature control: at the minimum, the laser(s) need to be temperature controlled to spectrally match the WDM multiplexers [26]. Local thermal tuning of the RRMs can be combined with global temperature stabilization via a Peltier element.…”

Section: Introductionmentioning

confidence: 99%

Silicon photonics WDM transmitter with single section semiconductor mode-locked laser

Müller

Hauck

Shen

et al. 2015

Advanced Optical Technologies

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Abstract:We demonstrate a wavelength domain-multiplexed (WDM) optical link relying on a single section semiconductor mode-locked laser (SS-MLL) with quantum dash (Q-Dash) gain material to generate 25 optical carriers spaced by 60.8 GHz, as well as silicon photonics (SiP) resonant ring modulators (RRMs) to modulate individual optical channels. The link requires optical reamplification provided by an erbium-doped fiber amplifier (EDFA) in the system experiments reported here. Open eye diagrams with signal quality factors (Q-factors) above 7 are measured with a commercial receiver (Rx). For higher compactness and cost effectiveness, reamplification of the modulated channels with a semiconductor optical amplifier (SOA) operated in the linear regime is highly desirable. System and device characterization indicate compatibility with the latter. While we expect channel counts to be primarily limited by the saturation output power level of the SOA, we estimate a single SOA to support more than eight channels. Prior to describing the system experiments, component design and detailed characterization results are reported including design and characterization of RRMs, ring-based resonant optical add-drop multiplexers (RROADMs) and thermal tuners, S-parameters resulting from the interoperation of RRMs and RR-OADMs, and characterization of Q-Dash SS-MLLs reamplified with a commercial SOA. Particular emphasis is placed on peaking effects in the transfer functions of RRMs and RR-OADMs resulting from transient effects in the optical domain, as well as on the characterization of SS-MLLs in regard to relative intensity noise (RIN), stability of the modes of operation, and excess noise after reamplification.

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Section: Introductionmentioning

confidence: 99%

Silicon photonics WDM transmitter with single section semiconductor mode-locked laser

Müller

Hauck

Shen

et al. 2015

Advanced Optical Technologies

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“…A tunable or wavelength-locked laser WPE of 10% is assumed for total laser power calculation. Such lasers have recently been developed by several groupswith waveguide-coupled WPEs approaching 10% [53]- [56] and promising up to 20% in the near future.…”

Section: Link Budget For Silicon Photonic Intra-module and Intermentioning

confidence: 99%

Energy-Efficient Photonics in Future High-Connectivity Computing Systems

Krishnamoorthy

Schwetman

Zheng

et al. 2015

J. Lightwave Technol.

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Energy-efficiency has become a critical parameter in the design of high-performance computing systems. Typically, compute elements consume the most energy in current systems, withmemories and interconnect networks close behind. This paper proposes an energy-efficient, high-connectivity, petascale computing system for the year 2020 timeframe by addressing the energy requirements of these three components. We start with projections based on purely evolutionary computer system design trends, then include the impact of breakthroughs in processor design, memory packaging and optical interconnect technologies. Based on these projections, we motivate the development for a 1-pJ/b optical intrasystem interconnect technology that significantly increases system interconnect bandwidth and relieves the distance-based energy dependence of electrical alternatives. We show that improvements in compute, memory, and IO, when simultaneously applied, become a vision for many-chip photonically-interconnected modules that could lead to an order of magnitude improvement in energy efficiency in the 2020 timeframe. The vision hinges on a high-density, energy-efficient optical link that can connect electronic compute and memory elements across short chip-to-chip distances while also capable of kilometer or longer spans across data centers. We discuss the power budget to enable such a link and review experimental progress toward creating an ultra-dense, hybrid-integrated low-power silicon photonic link that will enable this vision.

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“…Due to its ultra high Q factor, large extinction ratio (ER) and compact size, ring resonators have become one of the most intensively used optical components for various applications, including optical sensors, WDM filters, laser cavities, optical switches, high-speed modulators [1][2][3][4][5] etc. There are many platforms to demonstrate ring resonators.…”

Section: Introductionmentioning

confidence: 99%

“…3 The same can be said about ring resonator based single mode laser cavities, as the FSR of the ring resonator will limit the tuning range of the laser. 5 The FSR is dependent on the parameters of a ring resonator as the equation (1) shows:…”

Section: Introductionmentioning

confidence: 99%

A simple and novel method to obtain an FSR free silicon ring resonator

Bogaerts

2016

SPIE Proceedings

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A simple and novel method to make a silicon ring resonator without the limit of free spectral range (FSR) is presented. For many applications, a ring resonator is desired with an ultra-wide FSR, a high quality factor, a large extinction ratio and low-fabrication complexity. In this paper we propose a novel method to obtain such a ring resonator, which is a single all-silicon microring with a FSR as large as 150 nm around 1550 nm. It's based on the well-known phenomenon of resonance splitting.

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High power and widely tunable Si hybrid external-cavity laser for power efficient Si photonics WDM links

Cited by 55 publications

References 16 publications

Silicon photonics WDM transmitter with single section semiconductor mode-locked laser

Silicon photonics WDM transmitter with single section semiconductor mode-locked laser

Energy-Efficient Photonics in Future High-Connectivity Computing Systems

A simple and novel method to obtain an FSR free silicon ring resonator

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