- #1
SchroedingersLion
- 215
- 57
Hi, another optics question:
In the amplifier of a Laser one can have amplified spontaneous emission (ASE) which is an undesired effect. One of my sheets (appended) suggests one can take countermeasures with so called Faraday rotators.
But the way I understand it, these optical isolators will just stop light from coming back - so not only the ASE light but also the ordinary laser light. But isn't the whole principle of an amplifier to send the light back and forth through the medium in order to increase the intensity via stimulated emission?
If I just wanted to cut off ASE light between two amplifiers, I could simply use an ordinary polarizer, couldn't I?
Regards
In the amplifier of a Laser one can have amplified spontaneous emission (ASE) which is an undesired effect. One of my sheets (appended) suggests one can take countermeasures with so called Faraday rotators.
But the way I understand it, these optical isolators will just stop light from coming back - so not only the ASE light but also the ordinary laser light. But isn't the whole principle of an amplifier to send the light back and forth through the medium in order to increase the intensity via stimulated emission?
If I just wanted to cut off ASE light between two amplifiers, I could simply use an ordinary polarizer, couldn't I?
Regards