- #1
Octo
- 2
- 0
Hi,
I am looking for a suitable method to couple light from 2 LEDs into a fiber and then join both fibers, so that I only have one fiber at the end so that both wavelengths can be emitted from a single fiber.
The first coupling step from LED into fiber seems to be more easy, I already heard some just put the fiber in front of the LED and hope for the best. This seems to work kinda well for them.
The more complex step is to couple light from two individual fibers into a single fiber afterwards. I know there are some fiber couplers, but unfortunately not in the wavelength range I want to use as far as I know (UV light decomposes glue).
Therefore, I think about using several ball lenses to achieve my goal, but my understandings of optics is not good enough to really know if it would work this way (or maybe is there a programm to calculate such things?). You can see my plan attached.
The scheme is somewhat size accurate, the light path is drawn from my hopes. :)
Here are my specs:
LED1: 365 nm, 120 ° angle
LED2: 465 nm, 130 ° angle
fiber: 1000 µm core, 300 - 800 nm, 0.39 NA or 0.22 NA
ball lenses: d = 8 mm or 4 mm, n = 1,458, 200 - 2200 nm
Can someone confirm, that this would work or tell me problems with this? I have in mind that I would need to adjust the lens fiber distances so that the focal length is correct.
Thanks
Octo
I am looking for a suitable method to couple light from 2 LEDs into a fiber and then join both fibers, so that I only have one fiber at the end so that both wavelengths can be emitted from a single fiber.
The first coupling step from LED into fiber seems to be more easy, I already heard some just put the fiber in front of the LED and hope for the best. This seems to work kinda well for them.
The more complex step is to couple light from two individual fibers into a single fiber afterwards. I know there are some fiber couplers, but unfortunately not in the wavelength range I want to use as far as I know (UV light decomposes glue).
Therefore, I think about using several ball lenses to achieve my goal, but my understandings of optics is not good enough to really know if it would work this way (or maybe is there a programm to calculate such things?). You can see my plan attached.
The scheme is somewhat size accurate, the light path is drawn from my hopes. :)
Here are my specs:
LED1: 365 nm, 120 ° angle
LED2: 465 nm, 130 ° angle
fiber: 1000 µm core, 300 - 800 nm, 0.39 NA or 0.22 NA
ball lenses: d = 8 mm or 4 mm, n = 1,458, 200 - 2200 nm
Can someone confirm, that this would work or tell me problems with this? I have in mind that I would need to adjust the lens fiber distances so that the focal length is correct.
Thanks
Octo