Electro-optic modulators for space using gallium arsenide

Walker, Robert G.; Cameron, N.; Zhou, Yixuan; Clements, S.

doi:10.1117/12.2296173

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Earlier work [2] on four-channel array-like devices (dual-polarization IQ modulators -DPIQMs) identified a clear 'inner' versus 'outer' dichotomy whereby the two outer and the two inner channels were well balanced, as expected from…”

Section: Channel Balance In Modulator Arraysmentioning

confidence: 86%

“…The environmental credentials of gallium arsenide in the GaAs/AlGaAs III-V semiconductor material system are well known; the large semiconductor bandgap yields environmental stability and a useful degree of radiation tolerance [2]. This makes it a natural choice for space-borne systems, with many desirable properties for RF devices which must survive and operate in harsh environments.…”

Section: Introductionmentioning

confidence: 99%

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Space-grade gallium arsenide IQ and modulator arrays for VHTS photonic SatCom systems

Walker

Cameron

Zhou

et al. 2023

International Conference on Space Optics — ICSO 2022

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We discuss the design and implementation of compact IQ modulators and modulator arrays to be monolithically integrated in the GaAs/AlGaAs material system. Considerations are presented for the design of GaAs traveling-wave electro-optic modulator arrays for space data-link applications. Central to the modulator design is a low loss folded optical configuration giving direct, straight-line RF access at one end of the device, with all fiber-optical ports at the opposite end. This configuration is a critical enabler for the close-packed monolithic modulator arrays needed for multi-channel applications. It also leads to much more compact packaging, improved fiber handling and contributes to high modulation bandwidths with low ripple by eliminating directional change in the RF feed arrangements. Typically, the folded devices are half the length of conventional format modulators and a modest array of devices (e.g. x4) can be accommodated in a package of similar dimensions to a single modulator. Design considerations for arrays of independently addressed MZ modulators (each with its own input fiber) are discussed. Both single MZ and monolithic dual-parallel (IQ) modulators have been assessed up to 70GHz, with bandwidths of 40-50GHz achieved with a low-frequency V below 3V. A novel integrated RF termination, of especial benefit to a compact array configuration, is demonstrated with return loss better than 12dB to 70GHz.

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Section: Channel Balance In Modulator Arraysmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Space-grade gallium arsenide IQ and modulator arrays for VHTS photonic SatCom systems

Walker

Cameron

Zhou

et al. 2023

International Conference on Space Optics — ICSO 2022

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A multi-tone high efficient bandwidth system with an eliminated even-order distortions using double dual-parallel Mach-Zehnder modulator

2021

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The H2020-SPACE-SIPHODIAS project: space-grade opto-electronic interfaces for photonic digital and analogue very-high-throughput satellite payloads

Sourikopoulos

Stampoulidis

Giannakopoulos

et al. 2021

International Conference on Space Optics — ICSO 2020

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The EU-SIPhoDiAS project deals with the development of critical photonic building blocks needed for highperformance and low size, weight, and power (SWaP) photonics-enabled Very High Throughput Satellites (VHTS). In this presentation, we report on the design and fabrication activities during the first year of the project concerning the targeted family of digital and microwave photonic components. This effort aims to demonstrate components of enhanced reliability at technology readiness level (TRL) 7. Specifically, with respect to microwave photonic links, we report: (i) the design of Ka and Q-bands analogue photodetectors that will be assembled in compact packages, allowing for very high bandwidth per unit area and (ii) on the design of compact V-band GaAs electro-optic modulator arrays, which use a folded-path optical configuration to manage all fiber interfaces packaged opposite direct in-line RF feeds for ease of board layouts and mass/size benefits. With respect to digital links, we report on the development of 100 Gb/s (4 x 25 Gb/s) digital optical transceiver sub-assemblies developed using flip-chip mounting of electronic and opto-parts on a high-reliability borosilicate substrate. The transceiver chipset developed specifically for this project refers to fullycustom 25 Gb/s radiation hard (RH) VCSEL driver and TIA ICs designed in IHP's 130 nm SiGe BiCMOS Rad-Hard process.

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Electro-optic modulators for space using gallium arsenide

Cited by 3 publications

References 7 publications

Space-grade gallium arsenide IQ and modulator arrays for VHTS photonic SatCom systems

Space-grade gallium arsenide IQ and modulator arrays for VHTS photonic SatCom systems

A multi-tone high efficient bandwidth system with an eliminated even-order distortions using double dual-parallel Mach-Zehnder modulator

The H2020-SPACE-SIPHODIAS project: space-grade opto-electronic interfaces for photonic digital and analogue very-high-throughput satellite payloads

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