New Optical Microchip Integrated with Silicon and Erbium

Many semiconductor researches are being conducted worldwide to find materials that have good amplification properties. Optical microchips made from silicon remain as the optical channel for conducting light and it is amplified with the help of splitters and couplers.

Image of the chip including silicon optical waveguide (SOI: silicon on insulator) as well as erbium-doped aluminium oxyde

Gallium arsenide has a good amount of amplifying capacity and it is also used for making semiconductor chips. Silicon and gallium arsenide, in spite of their amplification properties, can only perform passive conduction of light and have demerits while amplifying a signal or in the process of adding a light source on a microchip. Extensive studies on materials with good amplification property have brought out the high amplification property of materials doped with erbium.

Laura Agazzi, a PhD candidate of the University of Twente. has made a study on the optical properties of aluminium oxide doped with erbium. In her thesis titled, “Spectroscopic Excitation and Quenching Processes in Rare-Earth-Ion-Doped Al2O3 and their Impact on Amplifier and Laser Performance,” released on September 20, she has effectively brought out the amplification property of these materials that have high energy-transfer up conversion (ETU). As these materials have the danger of being exposed to high interactions with erbium ions, she focused her research on materials that minimize the reaction of erbium ions. She was successful in making a chip that is integrated with silicon and erbium for the first time in the history of optical microchips.

The prototype chip has the amplifying capacity of 170 Gbit/sec and able to gain signal of 7.2 decibel at infrared light (1533 nm). This will make the possibility of emission of light that is as narrow as 1.7 kHz. Ms. Agazzi assured that the prototype chip, if put to use on a large scale, can be beneficial not only to telecom market but also in sensor applications for tracing minute particles.

Will Soutter

Written by

Will Soutter

Will has a B.Sc. in Chemistry from the University of Durham, and a M.Sc. in Green Chemistry from the University of York. Naturally, Will is our resident Chemistry expert but, a love of science and the internet makes Will the all-rounder of the team. In his spare time Will likes to play the drums, cook and brew cider.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Soutter, Will. (2019, February 27). New Optical Microchip Integrated with Silicon and Erbium. AZoOptics. Retrieved on June 12, 2024 from

  • MLA

    Soutter, Will. "New Optical Microchip Integrated with Silicon and Erbium". AZoOptics. 12 June 2024. <>.

  • Chicago

    Soutter, Will. "New Optical Microchip Integrated with Silicon and Erbium". AZoOptics. (accessed June 12, 2024).

  • Harvard

    Soutter, Will. 2019. New Optical Microchip Integrated with Silicon and Erbium. AZoOptics, viewed 12 June 2024,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.