Large-Scale Integrated Silicon Photonic Circuits for Optical Phased Arrays

Sun, Jie; Yaacobi, Ami; Timurdogan, Erman; Su, Zhan; Cole, David B.; Hosseini, Ehsan Shah; Moresco, M.; Leake, Gerald; Coolbaugh, Douglas; Watts, Michael R.

doi:10.1364/ps.2014.pt4b.4

Cited by 18 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3) and the simulation (Fig. 1) in both near field and far field confirms the accuracy and reliability of the silicon photonic design and fabrication, as well as the high tolerance of phased arrays to phase and intensity noises [13]. Note that the center interference order in Fig.…”

supporting

confidence: 66%

Two-dimensional apodized silicon photonic phased arrays

et al. 2014

Self Cite

View full text Add to dashboard Cite

In this Letter, we demonstrate an 8×8 apodized silicon photonic phased array where the emission from each of 64 nanoantennas was tailored to exhibit Gaussian-shaped intensity distributions in the near field so that the sidelobes of the generated far-field optical beam were suppressed compared to that of a uniform phased array. With the aid of the 72 thermo-optic phase tuners directly integrated within the phased array, we dynamically shaped the generated optical beam in the far field in a variety of ways.

show abstract

supporting

confidence: 66%

Two-dimensional apodized silicon photonic phased arrays

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electro-optic modulators (EOMs) are widely used for the phase or intensity modulation of light waves in digital and analog fiber-optic systems. High-speed modulators are of particular interest due to their practical application in advanced telecommunication systems, radio-over-fiber systems, and test and measurement equipment [1][2][3]. For the purpose of high-speed modulation, lithium niobate [4], organic materials [5], and compound semiconductor systems [6] are used.…”

Section: Introductionmentioning

confidence: 99%

Multi-Parameter Optimization of an InP Electro-Optic Modulator

et al. 2020

View full text Add to dashboard Cite

In this article, a method for indium phosphide (InP) electro-optic modulator (EOM) optimization is introduced. The method can be used for the design and analysis of an EOM based on the Mach-Zehnder interferometer (MZI) design. This design is based on the division of the input optical signal into two optical paths and then, after processing, it combines the light into a single waveguide. The symmetry of the structure can provide state-of-the-art EOM characteristics with a push-pull control signal. Using a traveling wave electrode (TWE) design as a starting point, the authors varied the heterostructure design and optical waveguide parameters to obtain the optimal values of initial optical loss, evenness of the initial optical loss in the operating wavelength range, and the extinction ratio and length of the modulator arm. The key features of the proposed optimization method include the following: all independent input parameters are linked into a single system, where the relationship between the electrical and optical parameters of the modulator is realized; all physically realizable combinations of the input parameters are available for analysis; and EOM optimization is possible for one target parameter or for a group of target parameters. The results of the EOM optimization using the described method are presented.

show abstract

“…These days, optical phased arrays (OPAs) and waveguide diffraction gratings fabricated by the Si photonics CMOS process are being studied extensively as such nonmechanical devices. OPAs [2][3][4][5][6][7] consisting of a large number of optical micro-antennas synthesize an arbitrary beam by controlling the optical phase of each antenna. However, it is not easy to obtain the diffraction-limit beam with a very narrow beam divergence (δθ << 1.0°) because it requires extremely fine control; this makes it difficult to achieve a large number of resolution points and simple beam scanning.…”

Section: Introductionmentioning

confidence: 99%

Thermally controlled Si photonic crystal slow light waveguide beam steering device

Takeuchi¹,

Terada²,

Takeuchi³

et al. 2018

Opt. Express

View full text Add to dashboard Cite

The doubly periodic Si photonic crystal waveguide radiates the guided slow light into free space as an optical beam. The waveguide also functions as a beam steering device, in which the steering angle is changed substantially by a slight variation in the wavelength generated due to the large angular dispersion of the slow light. A similar function is obtained when the wavelength is fixed and the refractive index of the waveguide is changed. In this study, we tested two kinds of integrated heater structures and observed the beam steering using the thermo-optic effect. For a p-i-p doped waveguide, the heating current was made to flow directly across the waveguide and a beam steering range of 21° was obtained with a relatively low heating power and high-speed response of the order of 100 kHz, maintaining a narrow beam divergence of 0.1-0.3° and a 120 resolution points. We also performed a preliminary life test of the device but did not observe any severe degradation in the temperature variation of 80-430 K for the duration up to 20‒40 h. For a TiN heater device, we obtained the comparable beam steering characteristics, but the required heating power increased, and the response speed decreased drastically.

show abstract

Large-Scale Integrated Silicon Photonic Circuits for Optical Phased Arrays

Abstract: We present several optical phased arrays enabled by state-of-the-art large-scale silicon photonic integration which could find potential applications in optical switching, optical communications, light detection and ranging, and holography.

Cited by 18 publications

References 8 publications

Two-dimensional apodized silicon photonic phased arrays

Two-dimensional apodized silicon photonic phased arrays

Multi-Parameter Optimization of an InP Electro-Optic Modulator

Thermally controlled Si photonic crystal slow light waveguide beam steering device

Contact Info

Product

Resources

About