LDM-4990 1
CHAPTER 1
INTRODUCTION AND SPECIFICATIONS
This manual describes the LDM-4990 TO-Can Mount Laser Diode Mount and
related accessories and options and explains their operation. This chapter
provides an overview of the LDM-4990 and contains general information and
specifications important in its use. You should read the entire manual to
familiarize yourself with the operation of your LDM-4990 Laser Diode Mount
before installing laser diodes. In particular, you should read the section on
Electrical Connections before installing a laser diode. The information contained in
this section is necessary to provide correct electrical connection to your particular
laser.
Product Overview
The LDM-4990 Laser Diode Mounting Fixture provides a compact, easy to use
instrument for 9 mm, 5.6 mm and 5.4 mm packaged laser diodes. This mounting
fixture features an access door for easy device insertion and clamping, and easy
interchange between the packages without socket changes. The LDM-4990 can
also be quickly configured for three and four pin devices regardless of their pin
assignments through dip switches located next to the laser mounting plate. The
fixture offers active temperature control with an integrated thermoelectric module
and water cooling channels for a temperature control range of -20ºC to +85ºC.
High positional and thermal resistance repeatability ensure consistent device
testing and repeatable laser measurements.
The LDM-4990 facilitates power and wavelength measurement with an optional
rotating mounting post for mounting and locating ILX Lightwave OMH-6700 Series
measurement heads directly above the laser. A ball plunger detent locks the
head in place for consistent placement of the measurement head over the laser
diode. Power and wavelength measurements can be made with the OMM-6810B
Power Meter or the LPA-9080 Series Laser Parameter Analyzer.
The LDM4990 is quick to set up with connectors for laser current and temperature
control, a ground post for laser diode static protection during insertion and
