The Sharp LT031MD is a GaAlAs laser diode with VSIS chip structure. It has a built in photo diode for monitoring the laser output for use in automatic power control (APC) circuits. The common case pin is laser diode cathode and photo diode cathode.
These are new old stock diodes.
Output Power: 7mW typical, 10mW maximum.
Wavelength: 750nm typical, 760nm maximum. INFRARED
Operating Voltage: 1.85 Volts typical
Threshold Current: 50mA typical
Operating Current: 65mA typical
Monitor Current: 0.9mA typical.
Operating Temperature: -10 to 60 deg.C.
Package: TO-9, 9mm diameter base, Low cap type.
Note: Due to the sensitive nature of laser diodes, there is no warranty or exchanges on these items.