| Model Number | ALK-2001A | ALK-2001B | ALK-2001C | ALK-2001D | ALK-2001E |
| Operating wavelength（nm ） | 1310/1550nm | 850/1300nm | 1310/1490/1550nm | 850/1300
1310/1550nm | 850/1300/1310/
1490/1550nm |
| Applicable fiber | SM ,MM |
| Other optional wavelength（nm） | 980nm,1270nm,1577nm,1625nmetc(Optional) |
| Laser type | FP-LD(others specify on requests) |
| Output Power（dBm） | 6~-7dBm(0dBm optional) |
| Modulation（Hz） | CW，270，1K，2K |
| Fiber Port | FC/PC or FC,SC,ST interchangeable |
| Alkaline Battery | 3/AA，1.5V |
| Battery Operating time(h | 60H |
| Operation Temperature(℃) | -10~+60 |
| Storage Temperature(℃ | -25~+70 |
| Outline size（mm） | 200 x90 x50 |
| Weight(g) | 285 |