Athermalized low-loss echelle-grating-based multimode dense wavelength division demultiplexer.
A high-density wavelength division demultiplexer (DEMUX) capable of demultiplexing eight-channel 200-GHz optically spaced signals into a 62.5-microm multimode-fiber array is reported. The wavelength range of operation is from 1549.32 to 1560.61 nm within the International Telecommunication Union grid. The measured wavelength accuracy is within 0.04 nm. The mean insertion loss of this DEMUX is 1.95 dB. Thermal analysis and temperature testing results are reported. The temperature test cycling from 20 degrees C to 60 degrees C indicates that the wavelength thermal drift is less than 0.8 pm/degrees C. Adjacent cross talk is measured to be better than -45 dB. The measured data transmission bit rate of this device is higher than 3.5 Gb/s.
Qiao
Jie
J
Microelectronics Research Center, Department of Electrical and Computer Engineering, The University of Texas at Austin, 78758, USA.
Zhao
Feng
F
Chen
Ray T
RT
Horwitz
James W
JW
Morey
William W
WW