This is Laser Diode Source inside
Agilent 81689A tunable Laser Diode Souce.
Wave Lenght 1525-1575nm res0.01nm acc0.3nm
Very compact size and right weight
No warm up time needed |
|
When open cover on LD .
Bottom item is tuning motor with wheel and screw.
It drive to rotate the angle mirror. |
|
LD is marked 4827 .
LD beam go upper to fiber coupler .
A part of beam refrect to angle mirror for resonant tuning . |
|
Tuning mirror has pivot around left side and up down by reciprocal motor .
Center is half reflection mirror ??
Motor position checked by cource and fine sensor. |
|
Angle mirror has 45degree .
It reflect LD beam and change wavelength.
It has no tempature compensate as oven or heater. |
|
Agilent 81640A TLS
It has two output port High Power and Low SSE .
Left side is output. right side is LD module .
Module is large size and controle by Heater and Pertie element. |
 |
This is Optical Attenuator module.
Output fiber connect High Power output. Input fiber connect to LD . |
 |
ATTenuator
Wheel is connect to step motor .
Wheel is smoked glass ??
Attenation change rotation angle by motor. |
 |
Tunable LD unit
Right upper board is LD drive circuit . Gold cube is LD device.
Right lower is tuning motor unit.
Left lower is attenuator module .
Next is output power monitor for Low SSE output. |
 |
LD device
Right port has half mirror for tuning wavelenght and Low SSE output.
Left port is High power output . |
 |
High output port
LD device is drived by 4 of transistor and has modulation input. |
 |
Reciprocal Step motor
This connect to mirror . 4W cord is heater. Blue one is thermistor. |
 |
