Cynergy Technical Guide
850-1265-000, Rev. 4
39 of 112
PDL Laser Head
The PDL laser head is also a diffuse reflector that couples the light energy from the flashlamps
into the dye cell. The two, parallel flashlamps emit brief, intense bursts of white light when
excited by pulses of electrical current. This light provides the pump energy source for the lasing
medium. The anode or positive lead is identified by a red mark on the end of the electrode.
Always use finger cots when handling or cleaning the flashlamps. An OC and a max R mirror are
used in direct contact with the dye solvent to form the resonator. The PDL head is connected to
two fluid circuits, one for the dye solvent and the other for the water-cooling.
Resonator Reflectors
NOTE: Partial and Max R for PDL, Max R only for YAG
With the exception of the partial reflector (output coupler) of the YAG resonator, which is
achieved through the uncoated end of the YAG rod, the resonator mirrors are all adjustable
through screw adjustments that tilt on three non-orthogonal axes. For the laser to function
properly, they must be precisely adjusted.
Fiber Block
The fiber block consists of a monolithic Ultem structure that serves many functions. It serves as
mount to the optics involved in turning and combining the two lasers, as well as a safety shutter,
a shutter sense switch, aim LED, resonator port, focus lens and fiber sense switches. It mounts to
the head mounting plate, which combines and registers the two heads into a stable platform. A
description of the major components, as well as
Figures 14A
and
14B
describe the anatomy and
two functional modes of the fiber block: Cal and Treatment. With the shutter inactivated, the full
energy of the beam is sent to the resonator port. With the shutter activated and open, the beam is
directed to the treatment site or the cal port.
Turning/Alignment Mirror
The turning mirror is setup to reflect the YAG laser beam through the fiber block to the beam
combiner. The mirror is coated for maximum reflection at 45 degrees, as well as allowing for
good transmission of the aim laser. The alignment of this optic is critical to the operation of the
laser, and is the only optic that is adjustable in the beam train other than the resonator mirrors.
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