- High Resolution
- High Speed
- Large Time Delay Range
- High Reliability
- Low Insertion Loss
- Low Power Consumption
N-Bit, Lossless Variable Photonic Time Delay Module
This N-bit (N ≥ 10) Photonic Time Delay Module selectively routes optical signals through N fiber segments with the different lengths. Each fiber segment is defined to have the delay as
Where dT is the increment of time delay.
Therefore, the module provides N-bit of digitally variable time delay, having the total time delay as
N and dT can be defined by customer.
The EDFAs is used in the module to compensate the optical loss through optic fiber segments and switches. The optical loss between the optic fiber segment and the bypassing path is balanced internally to get the excellent uniformity of optical power between different time delays in long time delay ranges.
- True time delay evaluation
- Instrumentation
| N-bit Photonic Delay Module | Min | Typical | Max | Unit | |
| Wavelength band | 1535 | 1550 | 1565 | nm | |
| Insertion Loss [1] | 0 | 0.5 | dB | ||
| Cross Talk | 25 | 30 | 40 | dB | |
| Switching Time | CL type | 50 | 100 | µs | |
| NS type | 150 | 300 | ns | ||
| Repetition Rate [2] | CL type | 2 | kHz | ||
| NS type | 100 | kHz | |||
| Delay Time Range [3] | 0.05 | TBD[4] | ns | ||
| Polarization Dependent Loss | 0.25 | 0.5 | dB | ||
| IL Uniformity [5] | 1.0 | 1.5 | dB | ||
| Return Loss | 50 | dB | |||
| Operating Temperature | 0 | 60 | oC | ||
| Optical Power Handling | 0 | dBm | |||
| Storage Temperature | -40 | 85 | oC | ||
| Fiber Type | SMF-28 | ||||
| Package Dimension [6] | 19” mount rack | ||||
