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Achromatic waveplates consist of two plates – one made out of MgF2 and one out of crystalline quartz. The plates can be cemented or mounted with an air gap, depending on your needs.

Thorlabswaveplate

Manufacturing semiconductor chips for photonics and electronics is one of the most complex procedures in the world. For example, back in his university days, EFFECT Photonics President Boudewijn Docter described a fabrication process with a total of 243 steps!

Photonics is one of the enabling technologies of the future. Light is the fastest information carrier in the universe and can transmit this information while dissipating less heat and energy than electrical signals. Thus, photonics can dramatically increase the speed, reach, and flexibility of communication networks and cope with the ever-growing demand for more data. And it will do so at a lower energy cost, decreasing the Internet’s carbon footprint. Meanwhile, fast and efficient photonic signals have massive potential for sensing and imaging applications in medical devices, automotive LIDAR, agricultural and food diagnostics, and more.

Superachromatic Waveplate

While packaging, assembly, and testing are only a small part of the cost of electronic systems, the reverse happens with photonic systems. Researchers at the Technical University of Eindhoven (TU/e) estimate that for most Indium Phosphide (InP) photonics devices, the cost of packaging, assembly, and testing can reach around 80% of the total module cost. There are many research efforts in motion to reduce these costs, which you can learn more about in one of our previous articles.

Half-wave plate

Especially after the first fabrication run of a new chip, there will be a few rounds of characterization, validation and revisions to make sure the chip performs up to spec. After this first round of characterization and validation, the chip must be made ready for mass production, which requires a series of reliability tests in several environmental different conditions. You can learn more about this process in our previous article on industrial hardening. For example, different applications need different certification of the temperatures in which the chip must operate in.

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The process of making photonic integrated circuits is incredibly long and complex, and the steps we described in this article are a mere simplification of the entire process. It requires tremendous amount of knowledge in chip design, fabrication, and testing from experts in different fields all around the world. EFFECT Photonics was founded by people who fabricated these chips themselves, understand the process intimately, and developed the connections and network to develop cutting-edge PICs at scale.

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Real life is, of course, a lot more complicated and will require cycling through these steps tens of times, leading to processes with more than 200 total steps. Let’s go through these basic steps in a bit more detail.

Given its importance, we want to explain how photonic integrated circuits (PICs), the devices that enable all these applications, are made.

Yuqing Jiao, Associate Professor at the Eindhoven University of Technology (TU/e), explains the fabrication process in a few basic, simplified steps:

Quarter-wave plate

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The process of designing a PIC should translate an initial application concept into a functioning photonics chip that can be manufactured. In a short course at the OFC 2018 conference, Wim Bogaerts from Ghent University summarized the typical PIC design process in the steps we will describe below.

Figure 6 summarizes how an InP photonic device looks after the steps of layer epitaxy, etching, dielectric deposition and planarization, and metallization.

Achromatichalf-wave plate

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CCD/CMOS/NMOS image sensors for UV-VIS-NIR used for semiconductors, analytical instrumentation, spectroscopy applications and color measurement.

Band 7 - Shortwave Infrared (SWIR) 2, 2.11-2.29, 30 ; Band 8 - Panchromatic, 0.50-0.68, 15 ; Band 9 - Cirrus, 1.36-1.38, 30 ; Band 10 - Thermal Infrared (TIRS) 1 ...

SWIR or Short-Wave InfraRed imaging covers the wavelength range from 900nm to 1700nm. A large number of applications that are difficult or impossible to ...

By suitably selecting the thickness of the plates, the total phase shift can be kept nearly constant across a large wavelength range, due to the difference in birefringence. Standard wavelength ranges are 465 nm to 610 nm, 700 nm to 1000 nm, or 1200 nm to 1650 nm. Other ranges can be manufactured upon request.

Chip fabrication is a process with many sources of variability, and therefore much testing is required to make sure that the fabricated chip agrees with what was originally designed and simulated. Once that is certified and qualified, the process of packaging and assembling a device with the PIC follows.

Aug 3, 2023 — Medical lasers are medical devices that use precisely focused light sources to treat or remove tissues. The term laser stands for Light ...