Optical filters for wavelength division multiplexing

1983 ◽  
Author(s):  
Steven Bandettini
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Filters ◽  
Wavelength Division

SEMICONDUCTOR WAVELENGTH TUNABLE OPTICAL FILTERS

1993 ◽  
Vol 02 (04) ◽  
pp. 643-659 ◽  
Author(s):  
T. NUMAI
Keyword(s):  
Wavelength Division Multiplexing ◽  
Direct Detection ◽  
Optical Filters ◽  
Switching Systems ◽  
Switching Speed ◽  
Photonic Switching ◽  
Detection Scheme ◽  
Wavelength Division ◽  
Wavelength Tunable ◽  
Tunable Optical Filters

Wavelength-division multiplexing (WDM) lightwave transmission systems and wavelength-division (WD) photonic switching systems are attractive for improvement in line capacity for lightwave telecommunication services, because they utilize a huge wavelength (frequency) domain as signal channels. Wavelength tunable optical filters are key devices for these WDM and WD systems in direct detection scheme. In particular, semiconductor wavelength tunable optical filters are suitable for monolithic integration with photonic devices such as semiconductor lasers, switches and detectors. Also, the switching speed of wavelength is faster than that of other optical filters. This paper briefly summarizes the state-of-the-art semiconductor wavelength tunable optical filters and their applications to WD photonic switching systems.

Systematic identification of crosstalk and bandwidth upper limit in highly cascaded Mach-Zehnder lattice optical filters

2021 ◽  
Author(s):  
Jun Ushida ◽  
Tadashi Murao ◽  
Akemi Shiina ◽  
Tsuyoshi Horikawa
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication Systems ◽  
Direct Detection ◽  
Optical Filter ◽  
Optical Filters ◽  
Coupling Coefficients ◽  
Wafer Level ◽  
Wavelength Division ◽  
Level Measurement ◽  
Upper Limit

Abstract Crosstalk among channels in wavelength division multiplexing (WDM) filters must be suppressed to enhance receiver sensitivity in direct-detection-based optical communication systems. We present a systematic method to identify the maximum crosstalk and upper limit of the transmission spectrum bandwidth of a highly multi-staged Mach-Zehnder interference (MZI) lattice optical filter with a number of cascade N (N=1,2,…,∞). The scattering matrix including the wafer-level-measurement-based coupling coefficients of directional couplers is used to calculate the transmittance from the input to each output channel and the result is exactly extrapolated to infinite N. This method can be used to design, characterize, and evaluate $N$-cascaded MZI lattice optical filters that must meet strict WDM specifications.

Wavelength Division Multiplexing and Demultiplexing using Photonic Crystal Multi Channel Add Drop Filter: A Review

2016 ◽  
Vol 5 (4) ◽  
pp. 29
Author(s):  
BHADRA ANAMIKA ◽  
SAHU VIKAS ◽  
SHRIVASTAVA SHARAD MOHAN ◽  
ANSHU ◽  
SANGHVI ANJALI S. ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Wavelength Division Multiplexing ◽  
Wavelength Division
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