WE PROPOSE AN ALL-FIBER BASED 2.05-MICRON SINGLE FREQUENCY, NARROW LINEWIDTH SEEDER LASER WITH 10 NM TUNING…

Public award description

WE PROPOSE AN ALL-FIBER BASED 2.05-MICRON SINGLE FREQUENCY, NARROW LINEWIDTH SEEDER LASER WITH 10 NM TUNING RANGE AND 5GHZ FREQUENCY MODULATION FOR NEXT GENERATION LIDAR SYSTEM. HIGHLY TM-DOPED FIBER LASER IS USED AS A RESONANT PUMP SOURCE IN ORDER TO REDUCE THE PHASE NOISE AND LASER LINEWIDTH. AN ENVIRONMENT INSENSITIVE PACKAGE WILL BE USED TO MINIMIZE THE LASER PHASE NOISE AND LINEWIDTH. HO3+-DOPED FIBER IS USED FOR SEED LASER GENERATION, DUE TO ITS STRONG EMISSION AT 2.05 MICRON. A PIEZO ATTACHED TO HO-DOPED FIBER IS USED TO MODULATE THE FREQUENCY TO 5 GHZ WITH SPEED UP TO 10KHZ. THE SINGLE FREQUENCY 2.05-MICRON FIBER LASER CAN BE USED TO BUILD COHERENT LASER RADARS AND DIFFERENTIAL ABSORPTION LIDARS (DIALS) TO PERFORM INSTANT MEASUREMENT OF VELOCITY AND CONCENTRATION OF CO2 AND OTHER GASES , AEROSOLS, CLOUDS. THE HIGH-SPEED FREQUENCY MODULATION (5 GHZ) OF SINGLE FREQUENCY FIBER LASER USED AS LOCAL OSCILLATOR COVERS TUNING OVER A SELECTED CO2 ABSORPTION LINE. THE LARGE WAVELENGTH TUNING RANGE (10 NM) ALSO ENABLE SCIENTISTS AND ENGINEERS TO EXPLORE THE FEASIBILITY OF USING SUCH LASER FOR OTHER REMOTE SENSING APPLICATIONS.