On-chip wavelength locking for photonic switches

Khope, Akhilesh S. P.; Hirokawa, Takako; Netherton, Andrew; Saeidi, Mitra; Xia, Yujie; Volet, Nicolas; Schow, Clint L.; Helkey, Roger; Theogarajan, Luke; Saleh, A.A.M.; Bowers, John E.; Alferness, R. C.

doi:10.1364/ol.42.004934

Cited by 19 publications

(9 citation statements)

References 12 publications

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“…For each measurement the two voltages on the micro rings are optimized to get the best peak drop port transmission [55]. As reported in [5], the peak power is unimodal function of the heater voltages, i.e. has only one peak.…”

Section: X4 L=2 Switch: Doped Second Ordermentioning

confidence: 99%

“…Additionally, we discuss locking speed, statistical variation of heater resistances, and tuning speed of the switches. This work is published in [5,58].…”

Section: Introductionmentioning

confidence: 99%

“…5 shows a simulation of the blocking probability as a function of Λ and L, for M=N=16. As expected, we can see from the figure that larger L (i.e., more connectivity) leads to lower blocking probability due to contention.…”

mentioning

confidence: 99%

“…keithley_add is a list of GPIB id's, for ex [22,21]. or[5].2. keithley_iv: performs an IV sweep with 20 measurements for each V. Average current for each V is returned 3…”

mentioning

confidence: 99%

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Multi-wavelength selective crossbar switch

Khope

Saeidi

et al. 2019

Opt. Express

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When I started out at UC Santa Barbara as a PhD student in 2015, there was no funding until the AIM project proposal got accepted. Without funding no work gets done, so first I am grateful to Prof. Rod Alferness for funding me for the first year and Prof. John Bowers for funding me for the rest of my PhD. To John, thanks for giving me complete freedom at work without which I could not have explored so many different areas in research. I enjoyed our conversation in the monthly meetings with Rod, John and Adel. For the first few months of my PhD I spent a lot of time with Adel doing a literature survey, it was an exciting journey in a new field. To Adel, thanks for filtering out the unsound ideas and helping me frame my thoughts. I enjoyed our white board discussions. To Roger, Clint, Takako and Andy at the Datacom meetings for discussions and helpful feedback. To Tin, for the fun we had at the New York Training conference. To Alex, Warren, Eric and Andy for the excellent office environment. To Alex, for inspiring me to get Scuba certified and also for tips on cooking Thai cuisine. To Aranya, for being my climbing buddy. To Sean, Simran Lawrence, Wilson and many others, for the fun time we had at UCSB badminton intramural. To Chirag, for providing helpful advice when needed. Thanks to Nicolas, Geza, Christos, Sarat, Aditya for helpful discussions. I would also like to thank Minh, Tony, Paolo, Yuan and Alan for their helpful advice. Special Thanks to Songtao for help with high speed measurements. Thanks to my Pappa, Mamma and Sairaj for the support during my PhD and for recharge time in India. Finally I would also thank Jeremiah Hebding, Brett Attaway, and SUNY for their foundry services. v

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Section: X4 L=2 Switch: Doped Second Ordermentioning

confidence: 99%

“…Additionally, we discuss locking speed, statistical variation of heater resistances, and tuning speed of the switches. This work is published in [5,58].…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

“…keithley_add is a list of GPIB id's, for ex [22,21]. or[5].2. keithley_iv: performs an IV sweep with 20 measurements for each V. Average current for each V is returned 3…”

mentioning

confidence: 99%

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Multi-wavelength selective crossbar switch

Khope

Saeidi

et al. 2019

Opt. Express

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“…The wavelength-selective nature of MRR unit does require wavelength alignment across the switching circuit, adding extra overhead. Various schemes for fast and efficient wavelength locking have been demonstrated [77][78][79]. Routing of WDM signals has been demonstrated leveraging the comb-switching technique [73].…”

Section: Mrr-based Optical Switchesmentioning

confidence: 99%

Photonic switching in high performance datacenters [Invited]

et al. 2018

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Photonic switches are increasingly considered for insertion in high performance datacenter architectures to meet the growing performance demands of interconnection networks. We provide an overview of photonic switching technologies and develop an evaluation methodology for assessing their potential impact on datacenter performance. We begin with a review of three categories of optical switches, namely, free-space switches, III-V integrated switches and silicon integrated switches. The state-of-the-art of MEMS, LCOS, SOA, MZI and MRR switching technologies are covered, together with insights on their performance limitations and scalability considerations. The performance metrics that are required for optical switches to truly emerge in datacenters are discussed and summarized, with special focus on the switching time, cost, power consumption, scalability and optical power penalty. Furthermore, the Pareto front of the switch metric space is analyzed. Finally, we propose a hybrid integrated switch fabric design using the III-V/Si wafer bonding technique and investigate its potential impact on realizing reduced cost and power penalty.

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