====D8====

==Past:==

D8 was proton exchanged for 10 minutes and annealed for 45 minutes. 

Prepped with pmma and aqua save for ESEM.

Written in ESEM at Spot 5 for long transducers, developed for 1 minute. 

Evaporated 200nm Aluminum, placed in NMP for liftoff. 

Liftoff successful for the Low and Mid frequencies. The High frequencies shorted. 

Sign
{{:samples:d:d8_sign.jpg?100|}}
Low F
{{:samples:d:d8lowf.jpg?100|}}
Mid F
{{:samples:d:d8midf.jpg?100|}}
High F
{{:samples:d:d8highf.jpg?100|}}


D8 was wire-bonded and impedance matched.  Transducers 1 and 2 showed no useful behavior (loops or divots on a Smith Chart) in the system analyzer.  Transducers 3-6 however were impedance matched well.

^            T1               ^            T2              ^            T3              ^
|  Useless   |  Useless  |  {{:samples:d:d8t3smith.jpg?200|}}  |
|  Useless   |  Useless  |  {{:samples:d:d8t3swr.jpg?200|}}  |
|            T4               |            T5              |            T6              |
|  {{:samples:d:d8t4smith.jpg?200|}}   |  {{:samples:d:d8t5smith.jpg?200|}}  |  {{:samples:d:d8t6smith.jpg?200|}}  |
|  {{:samples:d:d8t4swr.jpg?200|}}   |  {{:samples:d:d8t5swr.jpg?200|}}  |  {{:samples:d:d8t6swr.jpg?200|}}  |
v

Green (6.1V) waveguided light (mode 1) on transducer 5 was successfully deflected between 460-530 MHz and a video captured with a signal amplitude of 24 Dbm at the transducer. Increasing the input signal to 25 Dbm (15 Dbm as read on the signal generator) caused the deflected light to disappear and it appears that the transducer is now broken. It should be noted that normal mode lines were observed although faintly suggesting the need to improve my prism coupling technique. 


==Current:==
Needs to be tested.

==Future:==
??


Sample fabricated by Jacob Kimball\\
page updated 14 May 2015