1550nm Nanosecond Pulsed Fiber Laser for Distributed Temperature Sensing
Techwin 1.5µm Nanosecond Pulsed Erbium Doped Fiber with Broadband Linewidth (<1nm) and Ultra Low Phase Noise, Ultra Low Relative Intensity Noise (RIN) 1550nm Fiber Laser Source for Distributed Temperature Sensing(DTS) System
The nanosecond pulsed fiber laser is commonly designed with master oscillator power amplifier (MOPA) architecture. The master oscillator generates initial pulses at ns level. After pulse shaping, the single-stage or multi-stage power amplifier boosts the pulse supplied by the oscillator to achieve high power output.
The nanosecond pulsed fiber laser is a high power pulsed laser source based on the wavelength which is safe to human eyes. It adopts high performance narrow linewidth distributed feedback (DFB) semiconductor laser as seed source, and built-in signal generator. The multi-stage optical amplification is optimized to achieve high peak power laser output with ns level pulse width. This nanosecond pulsed fiber laser is suitable for distributed temperature sensing (DTS) system, fiber optic sensing, LiDAR and other applications in various industries.
These lasers are powered via 5-12V DC power supply, designed with industrial standard DB25 communication port. Besides, the pulse output can also be achieved by external TTL signal, suited for system integration.
Distributed Temperature Sensing System (DTS) uses fiber optic cable, typically over lengths of several kilometers, that function as linear temperature sensors. The result is a continuous temperature profile along the entire length of the sensor cable.
Distributed Temperature Sensing System DTS utilizes the Raman effect to measure temperature. An optical fiber laser pulse sent through the fiber results in some scattered light reflecting back to the transmitting end, where the information is analyzed.
The intensity of the Raman scattering is a measure of the temperature along the fiber. The Raman anti-Stokes signal changes its amplitude significantly with changing temperature; the Raman Stokes signal is relatively stable.
The DTS Technology is also known as Raman OTDR or Raman OFDR (Optical Frequency Domain Reflectometry). The Raman effect is named after the Indian physicist Sir Chandrasekhara Venkata Raman (1888-1970), who discovered that when light traverses a transparent material, some of the deflected light changes in wavelength. This ground-breaking work in the field of light scattering, earned him the Nobel Prize for Physics.
Some other DTS technologies also use the Brillouin backscatter(B-OTDR or B-OTDA),which carries strain and temperature information. Such systems are also called DTSS (Distributed Temperature and Strain Sensing). The challenge with these systems is to isolate the fiber from strain to get accurate temperature information.
- Eye-safe operating wavelength: 1550nm
- Peak power output: 100W
- Repetition rate adjusting range: 1kHz-1MHz
- Pulse width: 1ns-250ns
- Near diffraction-limited beam quality
- DC power supply, modular package
- Distributed temperature sensing (DTS) system
- Fiber optic sensing
- LiDAR
- Remote sensing surveying
- Free space communication
- Other scientific research tasks
Specifications:
|
Parameter |
Unit |
Specification |
||||
|
Min |
Typ. |
Max |
||||
| Part no. |
|
CKLS-1550-M-PL |
||||
| Wavelength range |
nm |
1527 |
1550 |
1570 |
||
| Spectral width (FWHM) |
nm |
- |
0.3 |
1 |
||
| Peak power1 |
W |
20 |
30 |
100 |
||
| Pulse width2 |
ns |
1 |
10 |
250 |
||
| Repetition rate3 |
kHz |
1 |
10 |
1000 |
||
| Beam quality |
M2 |
- |
1.1 |
1.2 |
||
| Side-mode Suppression Ratio (SMSR) |
dB |
35 |
- |
- |
||
| Output power stability (15mins) |
dB |
- |
±0.003 |
±0.005 |
||
| Output power stability (8hrs) |
dB |
- |
±0.03 |
±0.05 |
||
| Output isolation |
dB |
35 |
- |
- |
||
| Return loss |
dB |
40 |
- |
- |
||
| Operating temperature |
℃ |
-25 |
- |
50 |
||
| Storage temperature |
℃ |
-40 |
- |
85 |
||
| Output fiber type |
|
SMF-28 |
||||
| Output fiber length |
m |
> 1 |
||||
| Optical connector |
|
FC/APC |
||||
| Trigger mode |
|
Internal or External TTL Trigger |
||||
| Signal interface |
|
SMA |
||||
| Control interface |
|
RS232 |
||||
| Power supply |
VDC |
5-24 |
||||
| Dimension |
mm |
150(L)x125(W)x25(H) |
||||
Specifications:
· Higher output power can be customized.
· Pulse width is optional or tunable from 1 to 250ns.
· Repetition rate is optional or tunable from 1kHz to 1MHz.
Ordering Information:
· CKLS-1550-M-PL-<PW>
· M: Module
· PW: Peak power in W. Example: 30-30W, 50-50W
Techwin is known as an expert company in developing and manufacturing of fiber lasers, fiber amplifiers and fiber sources. We also strive to provide our customers with custom fiber laser solutions suited for your applications. All of our high-power fiber lasers and amplifiers are manufactured following a rigorous quality management system. We are more than happy to share our laser technology with worldwide customers, and committed to earn the ongoing trust of our customers with our industrial fiber lasers coupled with expert support and service in various industrial segments.
