Journal
OPTICS EXPRESS
Volume 19, Issue 2, Pages 870-875Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.000870
Keywords
-
Categories
Funding
- National Institute of Communications and Technology (NICT)
Ask authors/readers for more resources
We have realized a high-detection-efficiency photon number resolving detector at an operating wavelength of about 850 nm. The detector consists of a titanium superconducting transition edge sensor in an optical cavity, which is directly coupled to an optical fiber using an approximately 300-nm gap. The gap reduces the sensitive area and heat capacity of the device, leading to high photon number resolution of 0.42 eV without sacrificing detection efficiency or signal response speed. Wavelength dependent efficiency in fiber-coupled devices, which is due to optical interference between the fiber and the device, is also decreased to less than 1% in this configuration. The overall system detection efficiency is 98%+/- 1% at wavelengths of around 850 nm, which is the highest value ever reported in this wavelength range. (C)2011 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available