Optical Channel Monitor
Description
Optoplex Optical channel monitor (OCM) uses proprietary thin-film interference filter technology combined with a micro-actuator and high-speed electronics. Optical channel monitor is used to measure critical information data on optical transmission signals in DWDM networks for monitoring signal dynamics, determining system functionality, identifying performance change, and providing feedback for controling network elements so as to optimize operational performance. In particular, Optoplex Optical channel monitor can automatically scan the C-, L- or C+L-band wavelength range and precisely measure channel wavelength, power, and optical signal-to-noise ratio (OSNR). See the following schematic diagram for OCM working principle.
Operating through a continuous wavelength scan and built-in wavelength reference with optical tunable filter technology, Optoplex's Optical channel monitor has a high wavelength accuracy and resolution with a low channel cross-talk. Built with Optoplex's high-isolation and wide passband thin-film filter and assembled together with high-grade single detector, Optoplex's Optical channel monitor increases channel power measurement accuracy and dynamic range. Using an innovative optical design and high-grade single-element InGaAs detector, channel OSNR measurement range is increased to >30 dB. Further, the Optical channel monitor includes a built-in filter driver and PCB to control and interface with all data-processing electronics. DPRAM, RS-232, or USB interfaces are available and can be customized to meet specific requirements. Optoplex's Optical channel monitor has passed Telcardia GR-468-CORE tests. Moreover, the Optical channel monitor device features compact size and low cost.
Features and Benefits of Optical Channel Monitor
High Dynamic Range
Low Temperature Sensitivity
High Reliability and Repeatability
High Power and Wavelength Accuracy
Built-in Wavelength Reference
Compact Size
Firmware Upgradeable
25 GHz and 33 GHz Channel Spacing Available
Copackaged 2-in-1 OCM available (2-port OCM)
Telcordia GR-468 Qualified
Applications of Optical Performance Monitor
Optical Add/Drop Monitoring
Optical Performance Monitoring of DWDM System
Optical Power Monitoring for Gain Equalization
System Alarms or Error Warnings
Portable OSA/Spectrometer
OPM/OCM Product Specification (Standard Version)
Parameter
Unit
50 GHz
100 GHz
Wavelength Range
nm
C-, L- or C+L-band
Channel Number (for C- or L-band)
-
80 or 96
40 or 44
Adjacent Channel Power Difference
dB
< 13
< 15
Non-Adjacent Channel Power Difference
dB
< 20
< 25
Minimum Spacing Between Channels
GHz
40
75
Maximum Input Power
dBm
23
Channel Input Power Range
dBm
- 40 ~ - 10
Absolute Channel Power Accuracy
dB
0.5
Relative Channel Power Accuracy
dB
0.3
Power Measurement Repeatability
dB
0.1
PDL
dB
< 0.3
Absolute Wavelength Accuracy
pm
50
Relative Wavelength Accuracy
pm
30
Channel Wavelength Resolution
pm
20
OSNR
dB
> 25
> 28
OSNR Accuracy
dB
1.5
Noise Floor
dBm
-60
Response Time
ms
< 200 (Power & Wavelength)
< 500 (Power, Wavelength & OSNR) Power Consumption
W
< 2 Operating Temperature Range
C
-5 ~ 65
Storage Temperature Range
C
-40 ~ 85
40/100G Capability
Modulations
Data Rate (Gb/s)
Modulations
Data Rate (Gb/s)
OOK
2.5; 10
DP-DPSK
40
RZ-OOK
10
DP-DQPSK
100
ODB
2.5, 10
DP-BPSK
40
PSBT
2.5, 10
PM-BPSK
40
DPSK
10, 40
PM-QPSK
40, 100
RZ-DQPSK
40
DC PM-QPSK
100
Notes:
1) For OPM’s capability to monitor various signals of different modulations and data rates, please consult with Optoplex for details.
2) Standard OPM with a dimension of 100x70x17.5mm and interface of UART or DPRAM available. Other custom footprint and interface available upon request.
3) 25GHz OPM for power monitoring available.
4) Custom made Dual-Mode OPM (it works for different channel spacing, 100/50, or 50/25GHz) available upon request.
Typical Performance of Optical Performance Monitor