Features:
- Offset Phase Locks up to ≥9.5 GHz
- Feed forward for fast frequency jumping
- Offset Frequency stability determined by external reference stability
- User-adjustable servo loop parameters
- Internal ramp generator
- Options for optical or electronic beat-note input
Precisely control slave laser frequency offset
The D2-135 Offset Phase Lock Servo (OPLS) is designed to precisely control and quickly adjust the frequency detuning between two lasers. The D2-135 provides for an extremely tight phase lock between the master and the slave. The D2-250 Heterodyne Module conveniently enables the overlap and fiber coupling of two laser beams. This mates with a FC fiber connector on the D2-135, providing an easy optical input for the beat note. Alternatively, the fiber connector can be exchanged with an SMA to input an electronic beat-note. One can detect the optical beat note with the D2-260, or a third-party high-speed detector. The D2-135 OPLS provides full servo-loop customization for optimization of most lasers.
Typical Phase Lock using the D2-135 and two D2-100-DBR lasers. Note x-axis is divided by 2 so that the actual offset is 400 MHz.
The D2-135 integrates into our Rackless Rack. As such, it may be powered with our D2-005 or from an adjacent D2 electronics module. If used as a stand-alone product, it may be powered with either a D2-005, or from a user supplied power supply via a breakout board. View a typical configuration for using the D2-135.
| General Parameters | ||
|---|---|---|
| Min | Max | |
| Achievable Offsets | 250 MHz | >9.5 GHz |
| Beat Note Divisors | 8, 16, 32, 64 | |
| External Reference Frequency Range | 30 to 240 MHz | Compared with divided down beat note |
| Loop Filter Transfer Function | PID | Adjustable poles & gain |
| Gain Range | 0 to -76 dB | |
| Loop Filter Bandwidth | 10 MHz | |
| Output Voltage | -10 V | +10 V |
| Feed Forward Range | ±5 V | |
| D2-135-SMA electrical beat note input | ||
| Electrical Input Connector | SMA | |
| Electrical Beat Note Input Range | -10 dBm | +10 dBm |
| Electrical Beat Note Input Impedance | 50 Ω | |
| Achievable Offset in MHz | ||
| Internal VCO Reference (High Mode) | ||
| Offset Min | Offset Max | |
| N=8 | 770 | 1700 |
| N=16 | 1540 | 3400 |
| N=32 | 3080 | 6800 |
| N=64 | 6160 | 10000 |
| Internal VCO Reference (Low Mode) | ||
| Offset Min | Offset Max | |
| N=8 | 385 | 850 |
| N=16 | 770 | 1700 |
| N=32 | 1540 | 3400 |
| N=64 | 3080 | 6800 |
| External Reference: 30 – 240 MHz | ||
| Offset Min | Offset Max | |
| N=8 | 240 | 1920 |
| N=16 | 480 | 3840 |
| N=32 | 960 | 7680 |
| N=64 | 1920 | 10000 |
Downloads:
Related Information:
D2-260 High-Speed Detector
D2-250 Heterodyne Module
D2-150 Heterodyne Module (obsolete)
Phase Noise Measurement of the D2-135
Calculation of Phase Noise for the D2-135
D2-135 Phase Lock configuration
ICE-CP1 low-noise current driver and phase lock servo
Compare D2 and ICE laser control
