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|Title: ||Fabrication of polymer waveguides by laser ablation using a 355 nm wavelength Nd:YAG laser|
|Authors: ||Zakariyah, Shefiu S.|
Conway, Paul P.
Hutt, David A.
|Keywords: ||Laser ablation|
High bit rate
Optical circuit board
|Issue Date: ||2011|
|Publisher: ||© IEEE|
|Citation: ||ZAKARIYAH, S.S....et al., 2011. Fabrication of polymer waveguides by laser ablation using a 355 nm wavelength Nd:YAG laser. Journal of Lightwave Technology, 29 (23), pp. 3566-3576|
|Abstract: ||The demand for optical waveguides integrated
into Printed Circuit Boards (PCBs) is increasing as the
limitations of copper interconnects for greater than 10 Gb/s data
rates are being reached. Optical polymer materials offer a good
solution due to their relatively low cost and compatibility with
traditional PCB manufacturing processes. Laser ablation is one
method of manufacture, for which excimer lasers have been
used, but UV Nd:YAG (Neodymium-doped Yttrium Aluminium
Garnet) lasers are an attractive alternative due to their
widespread use within the PCB industry for drilling vias. In this
paper, 355 nm, 60 ns pulse length UV Nd:YAG laser ablation of
Truemode™ acrylate-based optical polymer was investigated.
The UV Nd:YAG laser was found to be able to ablate the
polymer efficiently and the effects of laser ablation power and
pulse repetition frequency (PRF) on depth of ablation were
studied and used to determine preferred settings. 45 μm × 45 μm
multimode optical waveguides were fabricated to demonstrate
the process and optical loss measurements were carried out.
These measurements demonstrated that the structures were able
to transmit light at the data communications wavelength of 850
nm (NIR), but further work is required to reduce the level of
loss. The use of UV Nd:YAG as a possible alternative to excimer
for laser micromachining would facilitate the rapid deployment
of the optical technology within the PCB industry.|
|Description: ||© 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.|
|Publisher Link: ||http://dx.doi.org/10.1109/JLT.2011.2171318|
|Appears in Collections:||Closed Access (Mechanical, Electrical and Manufacturing Engineering)|
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