Electro-optic THz dual-comb architecture for high-resolution, absolute spectroscopy

Jerez, Borja; Walla, Frederik; Betancur, Andrés; Martín-Mateos, Pedro; Dios, Cristina de; Acedo, Pablo

doi:10.1364/ol.44.000415

Cited by 27 publications

(14 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure 1, the benchtop TDCS that serves as a reference for the integrated architecture presented in this work is depicted [16]. In this system, a Narrow Linewidth Discrete Mode Laser is used as the optical source to create an initial seed optical comb using a cascade of electro-optic phase modulators.…”

Section: Tdcs Architecturementioning

confidence: 99%

“…According with the measurements made in ref. [16], when a whole optical comb is injected in a slave laser, there are residual sidebands which were mitigated, in relation to the comb lines locked, by about 30 dB. The rejection of the undesired sidebands depends on the frequency spacing among the comb lines, the injection ratio used on the slave laser and the frequency detuning.…”

Section: Comb Line Selection Stagementioning

confidence: 99%

“…On the other hand, TDS systems are benchtop implementations which makes them difficult to distribute widely in the world as a commercial product. In [16], we implemented a THz Dual-Comb Spectrometer (TDCS) using Optical Injection Locking (OIL) and electro-optical devices. This setup offers several advantages: (a) tunable resolution, (b) tunable frequency range, (c) easy operation and (d) enable real-time interrogation.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we propose a version of the TDCS presented in ref. [16][17][18][19], integrated in an InP Photonic Integrated Circuit (PIC). Moreover, the same PIC can be used as a THz or optical communication transmitter.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Design of a Multipurpose Photonic Chip Architecture for THz Dual-Comb Spectrometers

Betancur-Pérez

Martín-Mateos

Dios

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

In this work, we present a multipurpose photonic integrated circuit capable of generating multiheterodyne complex Dual-Combs (DC) THz signals. Our work focuses on translating the functionality of an electro-optic tunable DC system into a photonic chip employing standard building blocks to ensure the scalability and cost efficiency of the integrated device. The architecture we analyze for integration is based on three stages: a seed comb, a mode selection stage and a DC stage. This final DC stage includes a frequency shifter, a key element to improve the final detection of the THz signals and obtain real-time operation. This investigation covers three key aspects: (1) a solution for comb line selection on GHz spaced combs using OIL or OPLL on photonic chips is studied and evaluated, (2) a simple and versatile scheme to produce a frequency shift using the double sideband suppressed carrier modulation technique and an asymmetric Mach Zehnder Interferometer to filter one of the sidebands is proposed, and (3) a multipurpose architecture that can offer a versatile effective device, moving from application-specific PICs to general-purpose PICs. Using the building blocks (BBs) available from an InP-based foundry, we obtained simulations that offer a high-quality Dual-Comb frequency shifted signal with a side mode suppression ratio around 21 dB, and 41 dB after photodetection with an intermediate frequency of 1 MHz. We tested our system to generate a Dual-Comb with 10 kHz of frequency spacing and an OOK modulation with 5 Gbps which can be down-converted to the THz range by a square law detector. It is also important to note that the presented architecture is multipurpose and can also be applied to THz communications. This design is a step to enable a commercial THz photonic chip for multiple applications such as THz spectroscopy, THz multispectral imaging and THz telecommunications and offers the possibility of being fabricated in a multi-project wafer.

show abstract

Section: Tdcs Architecturementioning

confidence: 99%

Section: Comb Line Selection Stagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of a Multipurpose Photonic Chip Architecture for THz Dual-Comb Spectrometers

Betancur-Pérez

Martín-Mateos

Dios

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…In this paper, we present a modular THz dual-comb system based on electro-optical modulation of CW telecom lasers, and subsequent THz down-conversion by photomixers. The architecture of the system is an alternative version of the one presented in [4], and in particular in [5]. In this paper, however, all photomixers are EraAs:In(Al)GaAs photoconductors used in multi-heterodyne detection scheme.…”

Section: Introductionmentioning

confidence: 99%

Continuous-Wave Electro-Optic Terahertz Dual-Comb Operating from 0.096 to 0.496 THz Using ErAs:In(Al)GaAs Photoconductors

Fernandez

Betancur

Dios

et al. 2019

2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

Self Cite

View full text Add to dashboard Cite

An absolute-frequency terahertz (THz) dual-comb system was implemented using only standard telecom components, such as continuous-wave (CW) single mode lasers, optical modulators, and erbium-doped fiber amplifiers (EDFAs) for driving a pair of ErAs:In(Al)GaAs photoconductors. The dualcomb center frequency was tuned between 0.09596 and 0.49596 THz while the mode spacing was kept at 0.5 GHz, although any other lower frequency was also possible.

show abstract

Electro‐Optic Frequency Combs: Theory, Characteristics, and Applications

Zhuang

et al. 2023

Laser & Photonics Reviews

View full text Add to dashboard Cite

Optical frequency combs (OFCs) are a unique kind of light source, which are represented as a series of equally spaced coherent spectral lines in the frequency domain. OFCs can mainly be divided into mode-locked lasers, Kerr frequency combs, and electro-optic frequency combs (E-O combs), which have broad applications in optical communications, frequency metrology, atomic clocks, distance ranging, spectroscopy, and arbitrary waveform generation. Among them, E-O combs feature some unique advantages, such as fast tunable repetition rate, high sidebands power, and reconfigurability of the comb spectrum. Especially in recent years, with the development of micro-nano processing technology, on-chip E-O combs have become a dynamic research topic with many fundamental scientific problems as well as engineering applications for further exploration. To summarize the past development and envision the prosperous future of E-O combs, the area of E-O combs is reviewed from the following aspects: development of E-O combs; theory including the generation process of E-O combs and the electro-optic modulation models; important techniques including flattening, broadening, noise, and stability controlling; applications including communications, ranging, spectroscopy, wavelength calibration of astronomical spectrographs, and microwave generation; and pros and cons when compared with other OFCs.

show abstract

Electro-optic THz dual-comb architecture for high-resolution, absolute spectroscopy

Cited by 27 publications

References 25 publications

Design of a Multipurpose Photonic Chip Architecture for THz Dual-Comb Spectrometers

Design of a Multipurpose Photonic Chip Architecture for THz Dual-Comb Spectrometers

Continuous-Wave Electro-Optic Terahertz Dual-Comb Operating from 0.096 to 0.496 THz Using ErAs:In(Al)GaAs Photoconductors

Electro‐Optic Frequency Combs: Theory, Characteristics, and Applications

Contact Info

Product

Resources

About