Features
- Ultra-low phase noise and narrow linewidth
- Stable single-frequency operation
- Industrial OEM packaging
- Designed for Multi-channel systems (ACOUSTIK) or stand-alone
- Integrated fast wavelength modulation (optional)
This range of lasers is offered as compact modules typically for industrial OEM integration. It is also designed as a building block for our ADJUSTIK benchtop systems and the ACOUSTIK multi-channel systems. It is supplied with NKTP CONTROL software for the control and read-out of laser parameters on a PC such as wavelengths, output power, and RIN suppression.
Any interferometric use that requires high-frequency stability or a long coherence length will benefit from this type of laser technology. The typical applications are remote sensing, including seismic sensings, such as oil and gas exploration and exploitation, security (perimeter and pipeline detection), and structural pipeline monitoring.
Furthermore, the low-intensity noise of the lasers combined with the high spectral stability makes them ideal as sources for wind LIDAR systems used for the wind turbine and aerospace industry, as well as for interferometry laser vibrometry sensing systems.
Laser models
| Model | Standard Wavelength | Other wavelengths | Output power | PM | Fast modulation |
| X15 | 1550.12 nm | 1535 - 1580 nm | 30 mW 1) | Yes | Yes |
| E15 | 1550.12 nm | 1535 - 1580 nm | 40 mW 1) | Optional | Optional |
| C15 | 1550.12 nm | 1535 - 1580 nm | >10 mW | Optional | Optional |
| Y10 | 1064.00 nm | 1030 - 1120 nm | > 10 mW | Yes | Yes |
1) Adjustable output power.
C15: Is a co-doped Erbium/Ytterbium fiber laser for operation in the 1535-1580 nm wavelength range offering the lowest intensity noise (RIN) and is a shot-noise limited fiber laser.
X15/E15: Is an Erbium-doped fiber laser for operation in the 1535-1580 nm wavelength range offering the lowest phase and frequency noise and narrowest linewidth of the entire laser portfolio. It is often deployed for interferometric sensor or remote sensing applications, such as Distributed Acoustic Sensing (DAS), demanding 10s of kilometers of coherence length and ultra-high frequency stability.
Y10: Ytterbium-doped fiber laser system for operation in the 1030-1120 nm wavelength range with narrow linewidth and low-intensity noise. This laser is commonly used for laser stabilization, atomic physics, metrology, spectroscopy, fusion energy, general replacement of conventional Nd:YAG lasers, and many other applications.
Tuning and PM Options
- PM operation: The output of the BASIK fiber laser is per default single-mode fiber, however, we always offer a PM (Polarization Maintaining) option to ensure a fixed orientation of the polarisation. This may be required whenever the laser output needs to be externally modulated or frequency-converted.
- Thermal wavelength tuning: The Koheras fiber laser systems are by default thermally tunable to enable the user to match and stabilize the laser at a certain wavelength.
- Fast wavelength tuning: This feature can be offered for applications demanding higher wavelength stability than provided by the free-running laser. It enables the laser e.g. to be locked to an external reference such as an atomic transition line or interferometer.
Optical
| Model | X15 | E15 | C15 | Y10 |
| Laser emission | CW - inherently single frequency | |||
| Beam quality [M²] | < 1.05 | < 1.05 | < 1.05 | < 1.05 |
| Linewidth [kHz] 1) | < 0.1 | < 0.1 | < 15 | < 20 |
| Max phase noise
[dB((Rad/√Hz)/m)] |
-105@1 Hz -125@10 Hz -130@100 Hz -128@1 kHz |
-90@10 Hz -110@100 Hz -130@20 kHz |
-69@10 Hz -89@100 Hz -109@20 kHz |
- |
| Max phase-noise [(µrad/√Hz)/m] | 3.1 @1 Hz 0.6@10 Hz 0.3@100 Hz 0.4@1 kHz |
32@10 Hz 3.2@100 Hz 0.3@20 kHz |
355@10 Hz 36@100 Hz 3.5@20 kHz |
- |
| RIN peak [MHz] | app. 0.7 | app. 0.7 | app. 1 | app. 1.5 |
| RIN level @ peak / 10 MHz [dBc/Hz] | <-100 / <-135 | <-120 /<-140 | <-105 /<-140 | |
| Optical S/N (50 pm res.) [dB] | > 50 (typ. > 55) 2) | > 50 (typ. > 55) 2) | > 65 (typ > 70) | |
| Min thermal wavelength tuning range [pm] 3) | +/- 125 | +/- 350 | +/- 350 | +/- 240 |
| Total thermal tuning range [pm] | 350 | 1000 | 1000 | 680 |
| Options: | ||||
| Fast wavelength modulation range [GHz] 4) | 0.5 | 8 | 8 | 10 |
| Fast wavelength modulation [kHz] 4) | Up to 20 | |||
| PM output - PER [dB] 4) | > 23 | |||
| Monitor optical output | FC/APC | |||
1) Lorentzian
2) >47 dB (typ. > 52 dB) for non-PM version
3) Relative to center wavelength at room temperature. If the laser is operated in very cold or hot environments, this wavelength range is truncated on either the upper or lower side.
4) Default for X15 and Y10.
Mechanical / Electrical/Environmental
| Power supply requirements [VDC] | 12 |
| Power consumption [W] | Typical 4, max 12 |
| Electrical interface | 30 pin DIN41612 male |
| Fast modulation drive voltage | Differential 2x5 V with common-mode voltage at 2.5 V |
| Connectors | Standard: FC/APC pigtailed Option: Bulkhead/pigtailed FC/APC, SC/APC |
| Monitor output | Optional |
| Dimensions (HxWxD) [mm] | 22.5x91.2(111)x220 |
| Weight [kg] | 0.6 |
| Operating temperature range, module temperature [°C] | 15 - 60 |
| Storage temperature [°C] | -20 - 60 |
| Humidity non condensing [%RH] | 0-70 |
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| All NKT Photonics products are produced under our quality management system certified in accordance with the ISO 9001:2015 standard. |  |
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