April 2012
Intermediate to advanced
454 pages
14h 12m
English
Content preview from Silicon Photonics: Fundamentals and DevicesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
12.4 Methods for Improving Performance
This section discusses briefly the methods employed to make the grating insensitive to changes in polarization and temperature and to achieve flat frequency response.
12.4.1 Flat Frequency Response
The dispersion of focal position x with respect to wavelength is almost constant. The transmission loss in each channel of the normal AWG increases monotonically from the center wavelength. Furthermore optical signals pass through several filters in the network, and therefore their frequency response also affects the overall response in the channel, making it still narrower. This necessitates the design of flattened and broadened frequency response for AWG multiplexers.
Several approaches have been proposed to achieve a flat frequency response for the passband of AWGs. A flat-response AWG multiplexer with parabolic waveguide horns in the input waveguide with satisfactory performance has been reported in 14.
It has been confirmed that in order to obtain a flat spectral response, a rectangular electric field profile must be produced at the focal plane, that is, the interface between the second slab and output waveguides. The electric field profile in the focal plane is, in turn, the Fourier transform of the field in the output array aperture, that is, the interface between the array waveguide and the second slab. The needed electric field profile at the array output aperture is the sinc-type, which obeys a distribution, where is measured along the ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.