WHITE PAPERS

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 fiber optic 1xN switches are bidirectional opto-mechanical switches based on a coaxial design where a single MEMS mirror redirects light from a common fiber to one of N ports. The MEMS technology results in low insertion loss and low cross-talk between channels while keeping a constant switching performance over life.

The switch is available in several different variants to simplify integration in existing systems and reduce development cost. The miniature packages withstand rugged environments and is well suited for direct mounting on printed circuit boards.

The hermetically sealed MEMS and the laser welded fiber collimator guarantee broad temperature range and superior long-term stability. No epoxy is present in the optical path.

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

Sercalo’s COAXIAL TYPE 1xN switch is non-latching: at power-off it breaks the optical connection and routing of the common port is not defined. The component is bidirectional, the common port can be used as input or output. The PM Panda version is offered up to 1x4 ports.

The switch is available in four different variants:

SC: standard size – ribbon fibers
mSC: miniature size – small driver board: 7x40 mm
rSC: compatible with industry pin-out
bcSC: bare optical component

TECHNICAL SPECIFICATIONS

		Unit	Min	Typ	Max
*Optical Specifications*
Wavelength range		nm	1250		1670
Insertion loss up to 1x4¹		dB		0.4	1.0
Insertion loss up to 1x16¹		dB		0.8	1.2
Insertion loss up to 1x24¹		dB		1.0	1.5
Insertion loss up to 1x36¹		dB		1.2	2.0
Crosstalk		dB	50	60
Polarization dependent loss		dB			0.1
Return loss		dB	50	55
Wavelength dependent loss (one band)		dB			0.2
Wavelength dependent loss (1250–1670 nm)		dB		0.5	1.0
Temperature dependent loss		dB			0.2
Maximum optical power level²		mW			500
Switching time		ms		5	10
Cycle rate		Hz		10	50
Repeatability³		dB			0.01
Durability		cycles	No wear out
*Optical Specifications (PM fiber - up to 1x4)*
Polarization extinction ratio		dB	20
*Electrical Specifications (SC, mSC, rSC)*
Supply voltage		V	4.75	5	5.25
Power consumption, normal mode		mW			150
Power consumption, standby		mW		40
UART speed		baud	9600		115200
SMBus/I²C bus speed		kbps			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 voltage⁴		V	2.4	5	0.9
Reset active voltage		V		0
Reset pulse duration		μs	15
*Electrical Specifications (bcSC)*
Driving voltage		V	0
Driving voltage damage threshold		V			45
Electrostatic discharge tolerance⁵		V			50
*Package*
Operating temperature		˚C	-10		70
Storage temperature		˚C	-40		85
Operation humidity (non condensing)		% r.h.			95
Pigtail length		cm			100
Dimensions	SC	mm	40 x 21 x 7
	mSC	mm	40 x 7 x 7.5
	rSC	mm	68 x 30 x 9
	bcSC	mm	∅ 6 x 35
RoHS Compliance		2015/863/EU (no exceptions)

¹ Values at 25 ˚C at 1550 nm, without connectors. For operation over several bands 1250 to 1670 add 0.5 dB.
² It is recommended to turn off the laser during switch transients when switching optical power above 100 mW.
³For constant temperature and polarization.
⁴Through onboard pull-up resistor.
⁵The bare optical component is not protected against ESD.

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