August 8, 2016 19704 ‐ S01, Rev C Description The FPL1055T 1550 nm Fabry-Perot Laser Diode is based on quantum well epitaxial layer growth and a highly reliable ridge waveguide structure. This diode features high optical output power and slope efficiency. The FPL1055T TO-56 header option is a Ø5.6 mm header, featuring an anode pin, cathode pin, and an unused pin. Specifications T CHIP = 25 °C FPL1055T Symbol Min Typical Max Center Wavelength λ C 1530 nm 1550 nm 1570 nm Spectral Bandwidth (RMS) Δλ - 6 nm 10 nm Output Power Pulsed @ I PULSE P PULSED 275 mW 300 mW - Output Power CW @ I CW P CW 140 mW - - Operating Current Pulsed* I PULSE - 750 mA 1000 mA Operating Current CW I CW - 400 mA 500 mA Threshold Current I TH - 40 mA 50 mA Forward Voltage V F - 2.0 V 3.0 V Transverse Beam Divergence Angle (FWHM) [CW at 400 mA] θ T - 28° 37° Lateral Beam Divergence Angle (FWHM) [CW at 400 mA] θ L - 15° 23° *QCW (Current Pulse Width = 10 μs; Duty Cycle = 1%); T CHIP = 25 °C Performance Plots 1550 nm Fabry-Perot Laser Diode FPL1055T August 8, 2016 19704 ‐ S01, Rev C www.thorlabs.com/contact Drawing 6.5 mm 1.20 mm 0.45 mm Cathode Top View Anode 1.50 mm 1.0 mm 0.32 mm 1 mm 2 mm R 2.80 mm Header Heatsink Laser Junction Chip Emission is Centered on the TO Can to ± 0.100 mm Side View Pin Diagram Bottom View Case 2 3 1 3 2 1