SCTlinks

VCSELs and PIN Arrays

VCSELs and PIN arrays will be used in the off-detector electronics.  The specifications are available here.
8 way arrays of PIN diodes have been produced by AME. 4 way arrays of VCSELs and PIN diodes have been produced by MITEL

Photos of a MITEL array on a test PCB are available here

Measurements of the PIN diode arrays show a responsivity greater than 0.5 A/W and rise/fall times less than 1ns. A short report is available here.

DC measurements of the MITEL VCSEL array have been performed. AC measurements of the MITEL VCSEL array were carried out by driving a VCSEL channel with the VDC chip. The results show rise and fall times of about 1ns which is limitted by the VDC chip and the measurent apparatus itself. Scope pictures of the optical output are available for a clock frequency of 40 MHz, 80 MHz and 120 MHz. Note that the spikes visible are reflections due to the long lead length between the VDC and the VCSEL and would not be present in a more optimal packaging.

Mitel spec sheets are available here
4 channel PIN
4 channel VCSEL
12 channel PIN
12 channel VCSEL
pin out for arrays
Current proposals for the package  are avaialable here.

New test results on MITEL 12 channel PIN arrays are available here pdf file.