scholarly journals Mid-Infrared Silicon Photonics for Communications

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Goran Mashanovich ◽  
Wei Cao ◽  
Zhibo Qu ◽  
Ke Li ◽  
David Thomson ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Spectral Region ◽  
High Speed ◽  
Wavelength Region ◽  
Photonic Devices ◽  
Space Communications ◽  
Mid Infrared ◽  
Infrared Wavelength ◽  
Infrared Spectral ◽  
Silicon And Germanium

The mid-infrared wavelength region is important for a number of application areas, two of which are optical fibre and free space communications. Silicon photonics can provide inexpensive photonic chips for such applications due to excellent electronic and photonic properties. In this paper, the realisation of active silicon and germanium photonic devices for the mid-infrared spectral region are given. High speed Si depletion type modulators, Si and Ge injection modulators operating at wavelengths up to 8 micrometers, and high speed Si detectors are presented. These devices are integrated with drivers and amplifiers and show very good performance, e.g. data rate in excess of 20 Gb/s.

Silicon photonic devices for mid-infrared applications

Nanophotonics ◽  
2014 ◽  
Vol 3 (4-5) ◽  
pp. 329-341 ◽  
Author(s):  
Raji Shankar ◽  
Marko Lončar
Keyword(s):  
Gas Sensing ◽  
Wavelength Region ◽  
Photonic Devices ◽  
Ring Resonators ◽  
Space Communications ◽  
Mid Infrared ◽  
Silicon Photonic ◽  
Processing Techniques ◽  
Silicon Based

AbstractThe mid-infrared (IR) wavelength region (2–20 µm) is of great interest for a number of applications, including trace gas sensing, thermal imaging, and free-space communications. Recently, there has been significant progress in developing a mid-IR photonics platform in Si, which is highly transparent in the mid-IR, due to the ease of fabrication and CMOS compatibility provided by the Si platform. Here, we discuss our group’s recent contributions to the field of silicon-based mid-IR photonics, including photonic crystal cavities in a Si membrane platform and grating-coupled high-quality factor ring resonators in a silicon-on-sapphire (SOS) platform. Since experimental characterization of microphotonic devices is especially challenging at the mid-IR, we also review our mid-IR characterization techniques in some detail. Additionally, pre- and post-processing techniques for improving device performance, such as resist reflow, Piranha clean/HF dip cycling, and annealing are discussed.

High-speed photodiodes for the mid-infrared spectral region 1.2–2.4 μm based on GaSb/GaInAsSb/GaAlAsSb heterostructures with a transmission band of 2–5 GHz

2013 ◽  
Vol 47 (8) ◽  
pp. 1103-1109 ◽  
Author(s):  
I. A. Andreev ◽  
O. Yu. Serebrennikova ◽  
G. S. Sokolovskii ◽  
V. V. Dudelev ◽  
N. D. Ilynskaya ◽  
...  
Keyword(s):  
Spectral Region ◽  
High Speed ◽  
Transmission Band ◽  
Mid Infrared ◽  
Infrared Spectral Region ◽  
Infrared Spectral ◽  
5 Ghz

Determination of Wavelength Accuracy in the Near-Infrared Spectral Region Based on NIST's Infrared Transmission Wavelength Standard SRM 1921

2000 ◽  
Vol 54 (3) ◽  
pp. 450-455 ◽  
Author(s):  
Stephen R. Lowry ◽  
Jim Hyatt ◽  
William J. McCarthy
Keyword(s):  
Reference Material ◽  
Standard Reference Material ◽  
Spectral Region ◽  
Near Infrared ◽  
Cost Effective ◽  
Infrared Transmission ◽  
Internal Reference ◽  
Mid Infrared ◽  
Infrared Spectral Region ◽  
Infrared Spectral

A major concern with the use of near-infrared (NIR) spectroscopy in many QA/QC laboratories is the need for a simple reliable method of verifying the wavelength accuracy of the instrument. This requirement is particularly important in near-infrared spectroscopy because of the heavy reliance on sophisticated statistical vector analysis techniques to extract the desired information from the spectra. These techniques require precise alignment of the data points between the vectors corresponding to the standard and sample spectra. The National Institute of Standards and Technology (NIST) offers a Standard Reference Material (SRM 1921) for the verification and calibration of mid-infrared spectrometers in the transmittance mode. This standard consists of a 38 μm-thick film of polystyrene plastic. While SRM 1921 works well as a mid-infrared standard, a thicker sample is required for use as a routine standard in the near-infrared spectral region. The general acceptance and proven reliability of polystyrene as a standard reference material make it a very good candidate for a cost-effective NIR standard that could be offered as an internal reference for every instrument. In this paper we discuss a number of the parameters in a Fourier transform (FT)-NIR instrument that can affect wavelength accuracy. We also report a number of experiments designed to determine the effects of resolution, sample position, and optics on the wavelength accuracy of the system. In almost all cases the spectral reproducibility was better than one wavenumber of the values extrapolated from the NIST reference material. This finding suggests that a thicker sample of polystyrene plastic that has been validated with the SRM 1921 standard would make a cost-effective reference material for verifying wavelength accuracy in a medium-resolution FT-NIR spectrometer.

Pbs/PbSrS multi-quantum well laser emitting in the mid-infrared wavelength region

1990 ◽  
Vol 26 (20) ◽  
pp. 1715 ◽  
Author(s):  
S. Takahashi ◽  
N. Koguchi ◽  
T. Chikyow ◽  
T. Kiyosawa ◽  
J. Fujiwara ◽  
...  
Keyword(s):  
Quantum Well ◽  
Wavelength Region ◽  
Mid Infrared ◽  
Infrared Wavelength ◽  
Quantum Well Laser ◽  
Multi Quantum Well

scholarly journals Silicon photonics devices for integrated analog signal processing and sampling

Nanophotonics ◽  
2014 ◽  
Vol 3 (4-5) ◽  
pp. 313-327 ◽  
Author(s):  
Steven Spector ◽  
Cheryl Sorace-Agaskar
Keyword(s):  
Signal Processing ◽  
Silicon Photonics ◽  
High Speed ◽  
Analog Signal Processing ◽  
Photonic Devices ◽  
Analog Signal ◽  
Optical Systems ◽  
Analog To Digital ◽  
And Performance ◽  
Analog Systems

AbstractSilicon photonics offers the possibility of a reduction in size weight and power for many optical systems, and could open up the ability to build optical systems with complexities that would otherwise be impossible to achieve. Silicon photonics is an emerging technology that has already been inserted into commercial communication products. This technology has also been applied to analog signal processing applications. MIT Lincoln Laboratory in collaboration with groups at MIT has developed a toolkit of silicon photonic devices with a focus on the needs of analog systems. This toolkit includes low-loss waveguides, a high-speed modulator, ring resonator based filter bank, and all-silicon photodiodes. The components are integrated together for a hybrid photonic and electronic analog-to-digital converter. The development and performance of these devices will be discussed. Additionally, the linear performance of these devices, which is important for analog systems, is also investigated.

Vertical external cavity surface emitting PbTe/CdTe quantum dot lasers for the mid-infrared spectral region

2014 ◽  
Vol 39 (23) ◽  
pp. 6577 ◽  
Author(s):  
A. Khiar ◽  
M. Eibelhuber ◽  
V. Volobuev ◽  
M. Witzan ◽  
A. Hochreiner ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spectral Region ◽  
External Cavity ◽  
Cavity Surface ◽  
Quantum Dot Lasers ◽  
Mid Infrared ◽  
Infrared Spectral Region ◽  
Infrared Spectral ◽  
Cdte Quantum Dot

Spectral Effects of Water in the 10,000 to 8000 cm−1 (1000 to 1250 nm) near Infrared Spectral Region. And, Can They Explain Previously Seen Effects of Water in the Spectral Region from 14,000 to 11,500 cm−1 (714 to 870 nm)?

1995 ◽  
Vol 3 (3) ◽  
pp. 143-153 ◽  
Author(s):  
James B. Reeves
Keyword(s):  
Spectral Region ◽  
Diffuse Reflectance ◽  
Near Infrared ◽  
Detailed Examination ◽  
Fourier Transform Spectrometer ◽  
High Moisture ◽  
Mid Infrared ◽  
Infrared Spectral ◽  
And Shifts ◽  
Optic Systems

The spectral region from 10,000 to 8000 cm−1 (1000 to 1250 nm) is often used for high moisture samples and fibre optic systems. The first objective of this work was to determine the effects of water on the spectra of various types of materials in this spectral region. The second objective was to determine the origin/nature of spectral effects/artifacts seen in the spectral region from 14,000 to 11,500 cm−1 (714 to 870 nm) when water was added to gums and proteins (increases in peak intensities and shifts in position due to the presence of water). Spectra were obtained by diffuse reflectance and transmission using a Fourier transform spectrometer. The results showed that the effects seen in the mid-infrared and near infrared from 8000 to 4000 cm−1 (1250 to 2500 nm) were also common in this part of the near infrared (i.e. peak shifts, loss of spectral features etc). Thus, the spectra of crystalline glucose and sucrose, while distinctively different as crystalline solids, were very similar when in solution and changes in the spectra of materials, such as acetone, pyridine and ethanol, were very similar in nature to those previously found in the near infrared from 8000 to 4000 cm−1 (1250 to 2500 nm). Finally, detailed examination of spectra in the region from 10,000 to 8000 or 6000 cm−1 (1000 to 1250 or 1667 nm) did not show any spectral effects similar to those seen in gums and proteins in the 14,000 to 11,500 cm−1 (714 to 870 nm) region. Thus, the nature of these effects is still unknown.

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