High output power and narrow linewidth silicon photonic hybrid ring-filter external cavity wavelength tunable lasers

Satô, Kenji; Kobayashi, Noriyuki; Namiwaka, Masahiko; Yamamoto, Keisuke; Kita, Tomohiro; Yamada, Hirohito; Yamazaki, Hiroyuki

doi:10.1109/ecoc.2014.6964263

Cited by 25 publications

(10 citation statements)

References 7 publications

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“…A coherent transceiver for Ethernet would most likely have to use an integrated semiconductor tunable laser rather than a relatively bulky external cavity laser (ECL). Because of this, there has been great progress in recent years toward compact integrated devices with narrow linewidths [33], [34]. However, the distinctive FM noise spectrum of an integrated SCL can cause standard carrier phase recovery algorithms to fail, even when the 3 dB linewidth of the laser is theoretically narrow enough to allow penalty-free transmission [14].…”

Section: B Communicationmentioning

confidence: 99%

Laser Rate Equation-Based Filtering for Carrier Recovery in Characterization and Communication

Piels

Olmedo

Xue

et al. 2015

J. Lightwave Technol.

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Abstract-We formulate a semiconductor laser rate equationbased approach to carrier recovery in a Bayesian filtering framework. Filter stability and the effect of model inaccuracies (unknown or un-useable rate equation coefficients) are discussed. Two potential application areas are explored: laser characterization and carrier recovery in coherent communication. Two rate equation based Bayesian filters, the particle filter and extended Kalman filter, are used in conjunction with a coherent receiver to measure frequency noise spectrum of a photonic crystal cavity laser with less than 20 nW of fiber-coupled output power. The extended Kalman filter is also used to recover a 28 GBd DP-16 QAM signal where a decision-directed phase-locked loop fails.

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Section: B Communicationmentioning

confidence: 99%

Laser Rate Equation-Based Filtering for Carrier Recovery in Characterization and Communication

Piels

Olmedo

Xue

et al. 2015

J. Lightwave Technol.

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“…SiN-and SiO 2 -based external cavities offer lower loss, which enables lower linewidth and higher output power. However, overcoming the loss of the silicon cavity remains challenging, and SOA boosters have been used to ensure high output power [87]. To avoid the use of an extra booster SOA, a highsaturation-power SOA can be used, which has exhibited fiber-coupled optical power up to 20 mW (13 dBm) [72].…”

Section: Intracavity Filter and Wavelength Lockingmentioning

confidence: 99%

Coherent Optical Transceivers Scaling and Integration Challenges

et al. 2022

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The advancement of digital coherent technologies has dramatically increased the system capacity per singlecore single-mode fiber to the point that we can now approach the Shannon limit by utilizing high-order modulation formats and high-coding gain forward error correction (FEC) codes.Because the required energy per bit increases exponentially the closer we get to the Shannon limit, extending the available optical bandwidth by using ultrawideband wavelength-division multiplexing (WDM) and/or spatial-division multiplexing (SDM) is indispensable for increasing the system capacity with high energy efficiency. However, simple extensions of wavelength resources and spatial parallelization dramatically increase the number of transceivers (TxRxs) in proportion to the wavelength/spatial multiplicity. The key to achieving cost-and energy-efficient systems is to reduce the system complexity by using high-density integration and broadband optelectronics.In this article, we overview and discuss the recent advances of coherent optical transceivers integrated with an optical front end and digital signal processing (DSP)/application-specific integrated circuit (ASIC). We then present the transponder architectures and the challenges involved in applying them for massive parallelized transmission systems.

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“…The pumping light source for rubidium clock needs small volume, high reliability and stability, and precise wavelength. Compared to other ways of achieving single longitudinal mode (SLM) laser output, such as V-cavity, [5] DBR, [6] and external cavity, [7][8][9] DFB laser has many advantages such as compact structure, stable dynamic single mode, reduced noise level, and easy integration. [10][11][12][13][14] However, conventional DFB laser diodes are mostly based on complicated nanoscale lithography and etching techniques together with regrowth steps.…”

Section: Introductionmentioning

confidence: 99%

A 795 nm gain coupled distributed feedback semiconductor laser based on tilted waveguides*

Ma¹,

Chen²,

Lei³

et al. 2021

Chinese Phys. B

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The 795 nm distributed feedback lasers have great application in pumping the Rb D1 transition. In this paper, in order to realize specific 795 nm lasing, we designed tilted ridge distributed feedback lasers based on purely gain coupled effect induced by periodic current injection windows through changing the angle of the tilted ridge. The fabricated devices were cleaved into 2 mm-cavity-length, including 5 tilted angles. The peak output powers of all devices were above 30 mW. Single longitudinal mode lasing was realized in all tilted Fabry–Perot cavities using periodic current injection windows, with side mode suppression ratio over 30 dB. The total wavelength range covered 8.656 nm at 20 °C. It was disclosed theoretically and experimentally that the output powers, threshold currents, and central wavelengths of the tilted ridge purely gain coupled DFB lasers were relevant to the tilted angles. The results will be instructive for future design of DFB laser arrays with different central wavelengths.

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High output power and narrow linewidth silicon photonic hybrid ring-filter external cavity wavelength tunable lasers

Cited by 25 publications

References 7 publications

Laser Rate Equation-Based Filtering for Carrier Recovery in Characterization and Communication

Laser Rate Equation-Based Filtering for Carrier Recovery in Characterization and Communication

Coherent Optical Transceivers Scaling and Integration Challenges

A 795 nm gain coupled distributed feedback semiconductor laser based on tilted waveguides*

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