Ortel’s 1790 laser module is characterized for use as a CW coherent optical source
DFB laser operated in the 1550 nm wavelength band for LiDAR technology. Ortel’s
design provides a compact, robust solution for Frequency Modulation Continuous
Wavelength (FMCW) sensing for autonomous vehicles and wide variety of other
optical sensing applications.

The 1790 is DC-coupled with a built-in TEC, thermistor, and monitor photodiode.
The device is in a 14-pin, OC-48 pinout compatible hermetic butterfly package with
double optical isolator mounted on the TEC. It is highly immune to mode or optical
frequency hopping typically found with single isolator, external cavity designs.
Mode or optical frequency hopping causes false readings in FMCW LiDAR,
whereas Ortel’s laser technology maintains optical frequency stability over
temperature suppressing false readings. The 1790 incorporates a high-efficiency
coupling scheme to deliver 18 dBm of CW optical output power.