Optical ferrule assembly and optical adhesive formulation

An optical ferrule assembly comprising:

• an optical ferrule comprising an attachment area and a light coupling portion comprising a light input surface and a light output surface;
• an optical fiber secured to the attachment area and comprising a fiber end, the light input surface and the fiber end defining a gap therebetween;
• and
• a photocured optical adhesive substantially filling the gap and adhering to the light input surface and the fiber end, such that light propagating along the optical fiber and having a peak intensity I1≥3 GW/m2, exits the fiber end and enters the light coupling portion of the optical ferrule through the light input surface after traversing the gap through the photocured optical adhesive, and exits the optical ferrule through the light output surface after traversing the light coupling portion, the exiting light having a peak intensity I2, such that at least for a wavelength of about 1270 nm and after at least 100 hours of aging of the optical ferrule assembly at a temperature of at least 20 degrees C., any change in I2 due to a photodegradation of the photocured optical adhesive is no more than about 25%.

An optical ferrule assembly comprising:

• an optical ferrule comprising an attachment area and a light input surface;
• an optical fiber secured to the attachment area and comprising a fiber end, the light input surface and the fiber end defining a gap therebetween;
• and
• a photocured optical adhesive substantially filling the gap and adhering to the light input surface and the fiber end,
• such that when the optical ferrule assembly mates with a mating optical ferrule assembly that includes a mating optical fiber attached to a mating attachment area and the photocured optical adhesive substantially filling a mating gap between a mating fiber end of the mating optical fiber and a mating light input surface and adhering to the mating light input surface and the mating fiber end to form a mated optical assembly, light propagating along the optical fiber and having a peak intensity I1≥0.35 GW/m2 and at least a wavelength in a range of about 850 nm to about 1350 nm, the mated optical assembly has a first insertion loss, and after at least 600 hours of aging of the mated optical assembly at a temperature of at least 40 degrees C., the mated optical assembly has a second insertion loss different from the first insertion loss by no more than about 0.3 dB.