Quantum Instruments Cascade Laser Starter Kit - Manual (Page 40)

Starter Kit Instruction Manual Maintenance 39
[4] Install the new laser (4) into the holder
using small tweezers ( 0.5cm aperture).
[5] Hold the laser (4) on the gilded ceramic
pads with the tweezers pins along the axis of
the largest length of the copper submount.
[6] Place it in the receptacle parallel to the
window.
! Warning ! Avoid hitting the laser chip
facet on the case, it is extremely fragile.
[7] Place the screws (3) in the PET holder (5).
[8] Place the PET holder (5) on the two guides
(6) on the back of the laser receptacle being
careful of maintaining the PET holder higher
on the laser side than on the back side.
[9] Once the PET holder (5) is engaged in the
guides, push it down until contact with the
gilded ceramic pads is established.
[10] Screw it to the receptacle.
[11] Verify that the contact is established by
measuring with an ohm meter on the LLH100
low impedance plug.
Note: For reproducible measurement be care-
ful of measuring with the positive probe on the
+ LLH100 connection.
Note: If the contact is bad, adjust the plastic
screws at the pressing end of the PET holder
(5).
Note: If the contact is bad, clean the bottom
of the submount with grinding paper, be care-
ful of not damaging the bonding wires and the
laser facet.
[12] Place the dry desiccant bag close to the
low impedance line plug. Only applicable if
desiccation is needed and the lasers has been
shipped with a desiccant bag.
Note: This operation is preferably performed
in a gloves box under dry nitrogen atmosphere
if the ambient atmosphere is humid (this is
not necessary under normal conditions 50-60%
humidity).
[13] Close the cover (2) with the screws (1).
4
2
1
3
5
6
Fig.27: Replacing the laser