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2016 - Simultaneous blood flow and blood oxygenation measurements using a combination of diffuse speckle contrast analysis and near-infrared spectroscopy

2014 - Towards telecommunication payloads with photonic technologies

2013 - Trimodal detection of early childhood caries using laser light scanning and fluorescence spectroscopy: clinical prototype

2013 - A fiber-optic system for dual-modality photoacoustic microscopy and confocal fluorescence microscopy using miniature components

2012 - Miniaturized all-optical photoacoustic microscopy based on microelectromechanical systems mirror scanning

2011 - Effects of Radiation on MEMS

2011 - Digital optical tomography system for dynamic breast imaging

2006 - A flexible telecom satellite repeater based on microwave photonic technologies

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OVERVIEW

Sercalo’s Tunable Filter is composed by an optical system where light coming from the input fiber is collimated on a fused silica grating. The grating diffracts the light with a distinct angle for each wavelength. Light is then reflected by a MEMS mirror onto the output collimator which only couples a small fraction of it into the output fiber. By modifying the MEMS mirror tilt angle user can chose the central wavelength of the filter.

The Tunable Optical Filter is based on MEMS technology and is designed for ITU O, C and L band with 50 GHz or 100 GHz channel spacing. The highly reliable tuning mechanism uses an integrated micro-mirror with switching time below 50 ms and insertion loss below 3 dB.

The bare Tunable Filter component (BCTF variant) measures only 43x11x9.5 mm and is ideal for applications requiring reduced size and weight. The miniature package withstands rugged environments and is well suited for direct mounting on printed circuit boards.

An interface board with UART and I²C/SMBus is also available.

The component is compliant to Telcordia 1221 reliability standards and RoHS requirements 2015/863/EU.

#	FEATURES	APPLICATIONS
1	Small 43 x 11 x 9.5 mm³ body size	Re-configurable optical add/drop multiplexers
2	Low insertion loss	Optical sensor interrogators
3	Also available with UART and I²C/SMBus interface board	Optical power monitors
4		Low cost spectrometers

TECHNICAL SPECIFICATIONS

	*Unit*	*Min*	*Typ*	*Max*
*Optical Specifications*
Tuning range (O band variant)	nm	1260		1360
Tuning range (C band variant)	nm	1528		1569
Tuning range (L band variant)	nm	1570		1615
Insertion loss ¹	dB		2.5	4.0
Variant TFxx50	Full bandwidth @ 0.5 dB	nm		0.12
Full bandwidth @ 3 dB	nm		0.3
Full bandwidth @ 10 dB	nm		0.6
Full bandwidth @ 20 dB	nm		0.8
Variant TFxx100	Full bandwidth @ 0.5 dB	nm		0.2
Full bandwidth @ 3 dB	nm		0.5
Full bandwidth @ 10 dB	nm		1.0
Full bandwidth @ 20 dB	nm		1.2
Return loss	dB	30
Wavelength repeatability	nm		0.01
Wavelength temperature dependence	pm/˚C		1	5
Switching time	ms		10	50
Polarization dependent loss	dB		0.3
Durability	cycles	No wear out
Side Mode Suppression Ratio (SMSR)	dB	25
Electrical Specifications (optical component)
Driving voltage voltage	V	0		60
Driving voltage damage threshold	V			65
Electrostatic discharge tolerance²	V			70
*Electrical specifications (control board)*
Supply voltage	V	4.75	5	5.25
Power consumption (idle)	W		0.2
Power consumption (operating)	W		1
UART speed	baud	9600		115200
SMBus/I²C bus speed	kHz			400
Input logic level low	V		0	0.6
Input logic level high	V	2.4	5
Output logic level low	V		0	0.6
Output logic level high	V	2.6	3.3
Reset inactive voltage³	V	2.4	5
Reset active voltage	V		0	0.9
Reset pulse duration	μs	15
*Package*
Operating temperature	˚C	0		70
Storage temperature	˚C	-40		70
Operation humidity (non condensing)	% r.h.	0		95
Pigtail length	cm	50		100
Size (optical component)	mm	43.3 x 11.2 x 9.5
Size (with control board)	mm	45 x 23 x 10
Weight	g	75
RoHS Compliance	2015/863/EU (no exceptions)

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