FWM8612
FWM8612
Fast Wavelength Meter
With the growing demand for communication data, it is necessary to have a larger capacity optical communication transmission system, which drives optical component/network equipment manufacturers to use coherent communication modules based on wavelength tunable lasers in their transmission backbone networks. At present, the wavelength tunable lasers and coherent modules will be used in MAN, or even access networks. Accurate measurement and wavelength calibration are crucial for tunable lasers. With the continuous increase of communication channels from the initial 40 waves to the current maximum 800, efficient and accurate wavelength testing is more critical than ever.
Features
High Wavelength Accuracy
±0.33ppm (typ: ±0.5pm) for wavelength calibration and metrology
Fast Test
All-solid-state structure, non-mechanical moving parts optical design, fast test speed
Supports broadband Mode
Accurate wavelength measurement of 96Gbaud modulated optical signals
Rich Trigger Function
Supports external or internal trigger
Functions and Advantages
High Speed
The FWM8612 wavelength meter is in the ordinary single sampling mode, the sampling rate can be as high as 200Hz, which is 20-100 times that of the ordinary multi-wavelength based Michelson interferometer, the power accuracy <0.5dB, and the repeatability <0.02dB.
Internal Trigger Sampling Mode
FWM8612 has a built-in trigger signal generator, and its fast measurement function, as shown in the figure below, triggers 1000Hz to measure the switching cycle and stability of ordinary mechanical optical switches, and can observe the transient wavelength and power information of the tunable laser.
External Trigger Sampling Mode
FWM8612 fast wavelength meter supports 5V TTL trigger level and external trigger with sampling rate up to 1000Hz. It can simultaneously measure the scanning spectrum of tunable lasers, Mode Map scanning and channel calibration of tunable lasers, and synchronous monitoring of wavelength power of pulsed lasers.
Broadband Working Mode
High-speed modulation will make the original narrow linewidth laser (usually kHz~MHz) spectral broadening (96Gbaud modulation signal)。
Broadband Working Mode
FWM8612 has been further optimized on the basis of the original, and finally realized the accurate wavelength measurement of 400G QAM16 (96Gbaud) signal.
Instrument Specifications
| Wavelength Measurement | |
| Wavelength Range | 1250~1650 nm (182~240THz) |
| Wavelength Accuracy | ±0.33 ppm(±0.5pm@1550 nm) |
| Wavelength Repeatability | ±0.07 ppm(±0.1pm@1550 nm) |
| Wavelength Stability | <±0.3pm@24小时 |
| Wavelength Resolution | 0.1pm |
| Unit | nm, cm-1, THz |
| Power Measurement | |
| Calibration Accuracy | ±0.5 dB(±30nm from 1310 and 1550 nm) |
| Linearity | ±0.5 dB(1250–1650 nm) |
| Polarization Dependence | ±0.5 dB(1250–1650 nm) |
| Display Resolution | 0.01 dB |
| Unit | dBm, mW |
| Sampling Rate | |
| Single Sampling | Single sample～200 Hz |
| External Trigger | Up to 1000 Hz |
| Internal Trigger | 1~1000 Hz configurable |
| Triger | |
| Triger Level | TTL |
| External Trigger | Wavelength and power synchronized Trigger (1~1000 Hz) |
| Internal Trigger | Internal trigger frequency configurable (1~1000 Hz) |
| Input Optical Signal | |
| Input Optical Power | -30 dBm~+10 dBm
(8 µW~10 mW) |
| Optical Connector | 9/125µm Single mode fiber (FC/PC)
Optional：Single mode fiber（FC/APC） |
| Optical Connector Return Loss | >35 dB |
| Multi-peak Detection | |
| Minimum frequency separation between main and secondary peaks | 2300 MHz |
| Minimum power separation between main and secondary peaks | 17 dB |