Sum frequency generation Totally Explained

Everything about Sum Frequency Generation totally explained

Sum-frequency generation (SFG) is an example of a second order non-linear optical process.This phenomenon is based on the annihilation of two input photons at frequencies

omega_1

and

omega_2

while, simultaneously, one photon at frequency

omega_3

is generated. In order that the sum-frequency generation takes place it's necessary that the following two conditions happen:
1. Energy conservation:

hbaromega_3 = hbaromega_1 + hbaromega_2

2. Momentum conservation:

hbar k_3 = hbar k_1 + hbar k_2

The first condition shows the relationship of the frequencies between the input and output photons. It is possible to notice that the sum-frequency generation is a generalization of second harmonic generation. In the latter,

omega_1 = omega_2

, both of which can be provided by a single light source. The second condition implicates the k-vector conservation, in fact

Delta k = k_3 - k_2 - k_1 = 0

; this condition is called phase matching condition.
In a common SFG application, light from a tunable infrared laser is combined with light from a fixed frequency visible laser to produce an invisible sum frequency (SF) beam created by a wave mixing process.

Further Information

Get more info on 'Sum Frequency Generation'.

External Link Exchanges

Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:

<a href="http://sum_frequency_generation.totallyexplained.com">Sum frequency generation Totally Explained</a>

Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned.