LD-PD PTE.LTD. has launched a single-frequency Raman fiber amplifier with an ultra-wide wavelength range of 1120-1700 nm, filling the gap in emission wavelengths of rare-earth ion-doped fiber lasers. This series of single-frequency Raman amplifiers, based on Raman amplification technology, boasts a maximum output power of up to 30 W. Its all-polarization-maintaining, all-fiber structure ensures the laser features a compact design, excellent long-term stability, and maintenance-free operation. Meanwhile, it guarantees extremely low intensity noise and phase noise of the output laser. With characteristics such as high power, low-noise amplification, and ultra-fast seed cut-off protection, this amplifier meets the demand for lasers with special wavelengths in applications like laser atomic cooling and laser spectroscopy.
Specification |
Partnumber | SFL-FA-SF-X-Y-CW(1) |
Range | 1120nm-1340nm | 1340nm-1530nm | 1600nm-1750nm |
Output Power | >1W/8W/30W | >1W/5W/15W | >1W/5W |
Typical wavelength | 1315nm，1389nm, 1651nm |
Bandwidth(2) | >±5nm |
Relative Intensity Noise | <1% (RMS, 10Hz-10MHz Integration) |
Power Stability | <0.75% @3hours, RMS |
Power Tuning Range | 10-100% |
Output Mode | Single Mode PM Fiber with FC/APCconnector（Output Power≤5W) OR Collimated Output |
Beam Diameter | 0.6±0.2mm |
Beam Quality | TEM00，M²<1.1 |
Polarization | Linear, >23dB |
Seed Laser Input Power | >10mW(3) |
Seed Laser Input Isolation | >25dB |
Output Laser Isolation | >25dB |
Cooling | Air Cooling/ Water Cooling |
Operating Environment & Power Supply |
Temperature | 15-30 ℃（Air Cooling）OR 15-35 ℃（Water Cooling） |
Power Supply | 100V-240V, AC, 50/60Hz |
Communication | RS422 |
Note:
(1)X is the center wavelength，Y is the output power, if 15W 1340nm amplifier, the partnumber is SFL-FA-SF-1340-15-CW
(2) Bandwidth can be customized
(3) Default input power should be 10-50mW, for higher or lower input power, please email us for customization
Higher power, more wavelengths, customizable solutions
Power Spectral Testing
pumping current（A） | Output power (W) @ 32 mW seed | PD2 feedback value | PD3 feedback value |
8 | 0.01 | 0 | 0 |
9 | 0.03 | 0 | 0 |
10 | 0.15 | 0 | 0 |
11 | 0.7 | 0 | 0 |
12 | 3.68 | 22-30 | 233 |
13 | 9.95 | 50-102 | 656 |
14 | 17.44 | 170-330 | 1230 |
15 | 25.4 | 350-540 | 1668 |
15.5 | 29.9 | 600-680 | 2040 |
15.6 | 30.8 | 700-960 | 2058 |
Table 1. Output power versus current curve
Spectral Testing
The amplified output delivers 30 W at a central wavelength of 1180.108 nm, with a signal-to-noise ratio of 53 dB.
Figure 1. Output spectrum at 30 W power
Power Stability Testing
The laser has an output power of 30 W, with an RMS power stability of 0.31% over a 2-hour period.
Figure 2. 2-hour output power stability test
Polarization degree testing
The output laser is linearly polarized light with a polarization degree exceeding 19 dB.
Figure 3. Polarization degree measurement under different pump currents
Beam quality
The output beam quality measurement yields an M2 value of 1.04. The collimated output spot diameter is approximately 1.5 mm.
Figure 4. M2 Test
Line width testing
The seed line width is 111.6 kHz, and the amplified output line width measurement is 116.5 kHz.
