Wavelength-independent coupler from fiber to an on-chip cavity, demonstrated over an 850nm span.
A robust wide band (850 nm) fiber coupler to a whispering-gallery cavity with ultra-high quality factor is experimentally demonstrated. The device trades off ideality for broad-band, efficient input coupling. Output coupling efficiency can remain high enough for practical applications wherein pumping and power extraction must occur over very broad wavelength spans.
Carmon
Tal
T
Wang
Steven Y T
SY
Ostby
Eric P
EP
Vahala
Kerry J
KJ