5

MEMS VARIABLE OPTICAL ATTENUATORS

Specifications

Parameter

Normally Open

Normally Closed

Recommended method of operation

Constant power

Constant voltage

Operating wavelength range

C band

1525 to 1575 nm

1525 to 1575 nm

L band

1570 to 1610 nm

1570 to 1610 nm

Attenuation range

25 dB

40 dB

BOL

Maximum

0.8 dB (0.5 dB typical)

0.9 dB (0.7 dB typical)

EOL

Maximum

1.0 dB

1.1 dB

20 ms

20 ms

Optical power handling

24 dBm

24 dBm

Flatness

Maximum

0.3 dB (0.2 dB typical)

0.5 dB (0.3 dB typical)

Ripple

Maximum

0.15 dB (0.08 dB typical)

0.15 dB (0.08 dB typical)

0 to 10 dB

Maximum

0.1 dB (0.06 dB typical)

0.1 dB (0.06 dB typical)

10 to 20 dB

Maximum

0.2 dB (0.12 dB typical)

0.2 dB (0.12 dB typical)

20 to 30 dB

Maximum

-

0.3 dB (0.22 dB typical)

at IL

Maximum

±0.3 dB (<0.1 dB typical)

±0.3 dB (<0.1 dB typical)

at 10 dB

Maximum

±0.5 dB (±0.2 dB typical)

±1.2 dB (±0.5 dB typical)

at 20 dB

Maximum

±0.7 dB (±0.3 dB typical)

±1.2 dB (±0.5 dB typical)

at 30 dB

Maximum

-

±1.2 dB (±0.5 dB typical)

Repeatability

Maximum

0.1 dB

0.1 dB

Minimum

50 dB

45 dB

Maximum

6 V DC

5 V DC

Device resistance

Maximum

240

Ω

200

Ω

150 mW (120 mW typical)

150 mW (120 mW typical)

Fiber type

9/125/250 Corning SMF-28

9/125/250 Corning SMF-28

Fiber marking

Input port

Clear

Clear

Output port

Red

Red

Operating temperature

-5 to 75 °C

-5 to 75 °C

Reliability qualification

Telcordia 1209 and 1221

Telcordia 1209 and 1221

1. Excluding connectors.

2. For full dynamic range.

3. Over 0-20 dB attenuation for normally open, 0-30 dB attenuation for normally closed, at 1550nm.

4. Relative to 23±3 °C; under constant drive power for normally open; under constant drive voltage for normally closed.