The PC1310-90-APCa from Thorlabs Inc is a Fiber Optic Coupler with Wavelength 1310 nm, Directivity 55 dB, Insertion Loss 0.95 - 11.3 dB, Operating Temperature -20 to 70 Degree C, Storage Temperature - 40 to 85 Degree C. More details for PC1310-90-APCa can be seen below.