Photonic Integrated Circuits Using Heterogeneous Integration on Silicon

Komljenović, Tin; Huang, Duanni; Pintus, Paolo; Tran, Minh A.; Davenport, Michael; Bowers, John E.

doi:10.1109/jproc.2018.2864668

Cited by 141 publications

(83 citation statements)

References 92 publications

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“…The seamless integration of ULL waveguides adds another component to the fast-growing heterogeneous silicon/III-V platform [22].…”

Section: Laser Design a Ultralow-loss Silicon Platformmentioning

confidence: 99%

“…It benefits from mature CMOS-based silicon processing technologies and foundries. Heterogeneous integration also has the benefit of selecting the best material to perform each function (i.e., lasers, low-loss waveguides, detectors) to form highly complex photonic integrated circuits (PIC) [22]. Thus, it provides much more flexibility compared with a purely monolithic approach, while retaining the much-needed scalability that hybrid solutions lack.…”

Section: Introductionmentioning

confidence: 99%

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High-power sub-kHz linewidth lasers fully integrated on silicon

Huang

Tran

Guo

et al. 2019

Optica

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153

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We demonstrate a fully integrated extended distributed Bragg reflector (DBR) laser with ∼1 kHz linewidth and over 37 mW output power, as well as a ring-assisted DBR laser with less than 500 Hz linewidth. The extended DBR lasers are fabricated by heterogeneously integrating III-V material on Si as a gain section plus a 15 mm long, low-kappa Bragg grating reflector in an ultralow-loss silicon waveguide. The low waveguide loss (0.16 dB/cm) and long Bragg grating with narrow bandwidth (2.9 GHz) are essential to reducing the laser linewidth while maintaining high output power and single-mode operation. The combination of narrow linewidth and high power enable its use in coherent communications, RF photonics, and optical sensing.

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“…The seamless integration of ULL waveguides adds another component to the fast-growing heterogeneous silicon/III-V platform [22].…”

Section: Laser Design a Ultralow-loss Silicon Platformmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-power sub-kHz linewidth lasers fully integrated on silicon

Huang

Tran

Guo

et al. 2019

Optica

Self Cite

153

View full text Add to dashboard Cite

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“…An effective way to reduce the IL is moving the polarization rotator inside the MZI like in [37] and reducing the length of the nonreciprocal phase shift to its minimum, i.e., L1= L2=342 µm as described in section II.A. The implementation of this solution requires a precise bonding alignment or the development of an etching process for GGG and Ce:YIG similar to the one used for heterogeneous III-V on silicon [51]. Moreover, a larger current is needed to saturate the MO material.…”

Section: B Device Characterizationmentioning

confidence: 99%

Broadband TE Optical Isolators and Circulators in Silicon Photonics Through Ce:YIG Bonding

Pintus

Huang

Morton

et al. 2019

J. Lightwave Technol.

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Optical isolators and circulators are fundamental building block in photonic integrated circuits to block undesired reflections and routing light according to a prescribed direction. In silicon photonics, heterogeneous integration of magneto-optic garnet bonded on a pre-patterned silicon layer has been demonstrated to be an effective solution for manufacturing optical isolators and circulators for TM polarized light. However, most integrated semiconductor lasers emit TE polarized light, which indicates the need to find a reliable solution for this polarization. In this work, we demonstrated broadband optical isolators and circulators for TE polarized light based on heterogeneous bonding on the silicon photonics platform. To achieve this goal, an integrated adiabatic coupler and a broadband polarization rotator are designed and optimized. The nonreciprocal behavior is induced through an energy-efficient integrated electromagnet with a minimum power consumption of 3 mW. Two isolators/circulators are fabricated with small and large free spectral range, respectively. In the former case, an optical isolation ratio as large as 30 dB is measured at 1555 nm with an insertion loss of 18 dB, while for the broadband circulator an optical isolation larger than 15 dB is guaranteed over more than 14 nm (1.75 THz) for all port-combinations with an insertion loss between 14 dB and 18dB at 1560 nm. Finally, it has been theoretically shown that the insertion loss can be reduced below 6 dB with design and fabrication improvements. To the best of the authors' knowledge, the proposed integrated TE optical circulator is the first experimental demonstration of this device in silicon photonics.

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“…The existence of such robust limit cycles renders them crucial for the life itself, since they often occur in chemical and biological rhymes such as circadian oscillations [2-5], whose frequencies are determined by enviromental physical parameters. On the other hand, the existence of such limit cycles in manmade systems is crucially important for key technological applications such as time or frequency references [6,7] with their range of frequencies being controllable by the system parameters with significantly greater freedom in comparison to biological oscillators.Currently, there is intense interest in various implementations of ultrafast reconfigurable oscillators in systems and functional devices for next generation Photonic Integrated Circuits (PIC) [8,9] and RF photonics applications [10]. Due to the fact that single semiconductor lasers are not capable of supporting limit cycles, configurations based on optically coupled lasers have been proposed and intensively studied for more than four decades [11].…”

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confidence: 99%

Radically tunable ultrafast photonic oscillators via differential pumping

Kominis

Bountis

Kovanis

2020

Journal of Applied Physics

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We present the controllability capabilities for the limit cycles of an extremely tunable photonic oscillator, consisting of two coupled semiconductor lasers. We show that this system supports stable limit cycles with frequencies ranging from a few to more than a hundred GHz that are characterized by a widely varying degree of asymmetry between the oscillations of the two lasers. These dyamical features are directly controllable via differential pumping as well as optical frequency detuning of the two lasers, suggesting a multi-functional oscillator for chip-scale radio-frequency photonics applications.Limit cycles are the fundamental ingredients of a wide variety of physical as well as man-made systems exhibiting characteristic self-sustained oscillations. Their existence is directly related to the interplay of two characteristic features that can be met in almost all realistic models, namely nonlinearity and dissipation. In contrast to oscillations of conservative nonlinear systems whose frequency is determined by the initial energy of the system, limit cycles have frequencies that are determined solely by the parameters of the system and often constitute global attractors to which the system evolves for any initial condition [1]. The existence of such robust limit cycles renders them crucial for the life itself, since they often occur in chemical and biological rhymes such as circadian oscillations [2-5], whose frequencies are determined by enviromental physical parameters. On the other hand, the existence of such limit cycles in manmade systems is crucially important for key technological applications such as time or frequency references [6,7] with their range of frequencies being controllable by the system parameters with significantly greater freedom in comparison to biological oscillators.Currently, there is intense interest in various implementations of ultrafast reconfigurable oscillators in systems and functional devices for next generation Photonic Integrated Circuits (PIC) [8,9] and RF photonics applications [10]. Due to the fact that single semiconductor lasers are not capable of supporting limit cycles, configurations based on optically coupled lasers have been proposed and intensively studied for more than four decades [11]. In this context, Optically Injected Lasers (OIL) corresponding to a one-way coupling in a master-slave configuration [ Fig. 1(a)] have been shown to support relatively tunable limit cycles [12][13][14][15]; however, the need for a bulky optical isolator prevents their on-chip integration [9] and significantly restricts their applications. The utilization of strong mutual coupling, corresponding to complicated configurations where a single electric field mode is amplified by two gain blocks, has been shown to result to a gain-lever mechanism [ Fig. 1(b)] allowing for significant bandwidth-enhancing [16,17]. The case of evanecently coupled diode lasers is shown to be the most promising for photonic integration [9] and also capable of supporting stable limit cycles [18][19][20]. Ho...

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Photonic Integrated Circuits Using Heterogeneous Integration on Silicon

Cited by 141 publications

References 92 publications

High-power sub-kHz linewidth lasers fully integrated on silicon

High-power sub-kHz linewidth lasers fully integrated on silicon

Broadband TE Optical Isolators and Circulators in Silicon Photonics Through Ce:YIG Bonding

Radically tunable ultrafast photonic oscillators via differential pumping

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