Overview
Sercalo's fast optical MEMS switches (SW/SL family) are opto-mechanical switches for fiber optic communication systems and submodules. They switch light with a silicon micro-mechanical mirror, are designed for repeatable switching, and are qualified to Telcordia GR-1221.
The family includes latching and momentary (non-latching) types. In the latching SL type, a bistable suspension mechanism holds the last selected state when power is removed. The momentary SW type returns to its bar state at power off and is not recommended for new designs. The SLTS latching type adds an integrated capacitive sensor that reports the switch position.
The switches come in a miniature package built for rugged environments and are suited to direct mounting on printed circuit boards. They are controlled by TTL or CMOS logic signals. The product line can be configured with single-mode, multimode or bend-insensitive fiber, loose-tube or bare-fiber sleeving, different pigtail lengths and FC or LC connectors.
Key Features
- Fast latching or momentary switching
- 2x2 or 1xN port configurations up to 1x32
- Single-mode, multimode and specialty fiber options
- Ruggedized housing
- Insertion loss below 1 dB
- Meets Telcordia GR-1221 reliability requirements
- Meets RoHS requirements 2015/863/EU
- Suitable for direct mounting on printed circuit boards
- Switching mechanism does not wear out
- Latching switch mechanism
- Integrated capacitive state sensor gives a read-out of the switch position for self-test and monitoring
- Sensor output LOW (0 V) in cross state and HIGH (5 V) in bar state
- Available in 2x2, 2x1 and 1x1 variants
- Available as bare fiber (250 µm) and loose tube (900 µm) configuration
Specifications
| Interface | TTL |
|---|
| Wavelength Range | 1240 nm min., 1640 nm max. |
|---|---|
| Insertion Loss |
0.3 dB typ., 0.9 dB max.
Value excluding connector, measured at 0°C 25°C and 40°C
|
| Crosstalk | 75 dB typ., 60 dB max. |
| Backreflection | 55 dB typ., 50 dB max. |
| Polarisation Dependent Loss | 0.03 dB typ., 0.07 dB max. |
| Repeatability |
0.002
Max.; value for constant temperature and polarisation
|
| Switching Time |
0.5 ms typ., 1 ms max.
The same datasheet's overview and features state a response time below 10 ms (10 ms speed)
|
| Fiber Pigtail |
9/125/250
Available as bare fiber (250 µm) and loose tube (900 µm) configuration
|
| Durability | no wear out |
| Supply Voltage Vcc | 4.75 V min., 5 V typ., 5.25 V max. |
|---|---|
| Current Consumption Icc | 2 mA typ., 10 mA max. |
| Current sink Sensor Isensor |
10
Max.
|
| Logic Level Low (BR and CR select) |
0.5
Max.
|
| Logic Level High (BR and CR select) |
3.0
Min.
|
| Selection Pulse Width |
20
Min.
|
| Response Time SENSOR OUTPUT |
15 typ., 30 max.
Unit not stated in the datasheet
|
| Operation Temperature | -5 to 70 °C |
|---|---|
| Storage Temperature | -40 to 85 °C |
| Size (L x W x H) |
43 x 16.5 x 9.5
The product page lists 45x24x9.5 mm packaging for SLTS
|
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Protection switching
- Optical reconfiguration
- Test and measurements
Options & Accessories
| Option | Description |
|---|---|
| 1x2 | Variant: 1 input, 2 outputs |
| 2x2 | Variant: 2 inputs, 2 outputs |
| 1x4 | Variant: 1 input, 4 outputs |
| 1x8 | Variant: 1 input, 8 outputs |
| 1x16 | Variant: 1 input, 16 outputs |
| 9 | Fiber type: SMF28 |
| X | Fiber type: Bend insensitive fiber |
| 50 | Fiber type: MM 50 |
| 62 | Fiber type: MM 62 |
| N | Sleeve type: Loose Tube (0.9 mm) |
| B | Sleeve type: Bare fiber |
| 10 | Pigtail length: 100 cm |
| 03 | Pigtail length: 30 cm |
| NC | Connector: No connector |
| FP | Connector: FC-PC |
| FA | Connector: FC-APC — Also offered as FC-APC (narrow key) |
| LP | Connector: LC-PC |
| LA | Connector: LC-APC |
| SLTS-RI-2x2-9B | SLTS 2x2 switch, bare fiber |