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

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OVERVIEW

Sercalo's fiber optic SCBU NxM switches are bidirectional opto-mechanical switches based on coaxial design where a matrix of MEMS mirrors redirects light from N inputs to M outputs. The optical networks can be based on a strictly nonblocking matrix (from 4x4 up to 16x16 ports) or on a tree structure (up to 1x1116 ports).

The miniature package withstands rugged environments and is well suited for direct mounting on printed circuit boards.

The underlying MEMS technology results in low insertion loss and low cross-talk between channels while keeping a constant switching performance over life. The hermetically sealed MEMS and the laser welded collimators guarantee broad temperature range and superior long term stability. The part is designed to conform to Telcordia 1221 reliability standards. No epoxy is present in the optical path.

DESCRIPTION

Sercalo’s SCBU fiber optic switches are based on a strictly non-blocking bidirectional architecture. An additional status where the channels are disconnected is available. The switch is non latching: at power-off it breaks the optical connection and routing of ports is not defined. The component is bidirectional, i.e. the common port can be used as input or output of the light signal.

TECHNICAL SPECIFICATIONS

	Unit	Min	Typ	Max
Optical Specifications
Wavelength range	nm	1250		1670
Insertion loss (matrix)¹	4x4	dB		0.8	2.0
8x8, 16x16	dB		1.6	3.0
Insertion loss (tree)¹	1x16	dB		0.8	1.2
1x36	dB		1.2	2.0
1x72	dB		1.6	3.0
1x540	dB		2.2	3.5
1x1116	dB		2.4	4.0
Cross-talk	dB	50	60
Polarisation dependent loss	dB		0.1	0.18
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		1	20
Repeatability³	dB			0.01
Durability	cycles	No wear out
Electrical Specifications
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
Logic level low	V		0	0.6
Logic level high	V	2.4	5
Reset inactive voltage⁴	V	2.4	5
Reset active voltage	V		0	0.9
Reset pulse duration	ms	15
Package
Operating temperature	˚C	-10		70
Storage temperature	˚C	-40		85
Operation humidity (non condensing)	% r.h.	0		95
Pigtail length	cm	50		100
Dimensions	small size	mm	72 x 140 x 16
medium size	mm	100 x 180 x 16
large size	mm	185 x 180 x 16
RoHS Compliance	2015/863/EU (no exceptions)

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