Re: How to strip a 9 micrometer singlemode fiber?


Bob Pownall wrote:
Dendrites wrote:
<Summary: The OP is trying to couple a laser beam into a small
waveguide. Using a microscope objective hasn't worked, so the OP is now
trying to couple the light using a fiber.>

What you want to do can be done. I'm currently coupling light from a
cleaved, single-mode fiber with 4um core diameter into optical
dielectric slab waveguides as small as 0.5um wide and 0.3um high.
Coupling efficiency is lousy, though - 1% or less. That's enough for my
preliminary work, but I'm now trying to get better results with a lensed
fiber I purchased from Oz Optics. I tried some tapered fibers from
OE-Land, but they kept breaking on me, often while I was trying to
remove them from their "protective" packaging.

Note that I'm stripping the jacket from the fiber, but _not_ the cladding.

I'm using a Thorlabs piezostage, with a Thorlabs fiber clamp, to do the
fine positioning of the fiber relative to the waveguide.

Let me know what you come up with - maybe we can learn from each other.

Bob Pownall
P.S. Of course, you'll want to be careful with eye safety if you've
working with laser light in fibers and observing things through a
microscope. You may want to attach some sort of CCD camera to the
microscope and observe the results through a video feed - much safer.

Hi Bob,

I am very glad to know you! I have been frustrated with the work of
coupling light into my waveguide for a while. It would be very nice and
helpful to discuss with you. Hope we can keep contact! I will update my
progress to you, and we can learn from each other.

I am also considering ordering lensed fiber from OZ-Optics and OE-land.
I have high resolution translation stages from Thorlabs, but they are
not piezo controlled. And how do you finish your preliminary work? Just
by dirctly contacting the 4micron fiber( with only jacket stripped?) to
the waveguide?

Please contact me at qiulin@xxxxxxxxxxxxxxxx or maqiulin@xxxxxxxxx if
you like.

Thanks a lot!

Qiulin

.

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    ... The OP is trying to couple a laser beam into a small waveguide. ... I'm currently coupling light from a cleaved, single-mode fiber with 4um core diameter into optical dielectric slab waveguides as small as 0.5um wide and 0.3um high. ... I'm using a Thorlabs piezostage, with a Thorlabs fiber clamp, to do the fine positioning of the fiber relative to the waveguide. ... you'll want to be careful with eye safety if you've working with laser light in fibers and observing things through a microscope. ...
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