Koheras BASIK

Koheras BASIK – single-frequency fiber lasers

The Koheras BASIK single-frequency DFB fiber lasers are outstanding industrial low-noise Erbium and Ytterbium lasers. Get a low phase noise and a Hz-range linewidth typically only found in costly scientific systems.

The laser design ensures an inherent and robust single-frequency operation without any mode-hops. The footprint fits into the Koheras ACOUSTIK as a line card for multi-wavelength applications.

Key Features

Ultra-low phase noise, narrow linewidth

Stable single-frequency operation

Wide wavelength tuning

Integrated fast wavelength modulation

Industrial OEM packaging

Multi-channel system or stand-alone

Models and options

X15 Erbium lasers
X15 Erbium lasers
Standard wavelength 1550.12 nm
Output power 30 mW
Options
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
E15 Erbium lasers
E15 Erbium lasers
Standard wavelength 1550.12 nm
Output power 40 mW
Options
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
Y10 Ytterbium lasers
Y10 Ytterbium lasers
Standard wavelength 1064.00 nm
Output power > 10 mW
Options
Ytterbium-doped fiber laser system for operation in the 1030-1120 nm wavelength range with narrow linewidth and low-intensity noise.
Other options
Other options
Options
Polarization-maintaining operation. Thermal wavelength tuning. Fast wavelength tuning.

Want to know more?

Get in touch with one of our Koheras laser experts and learn more

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 our user-friendly 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.

Want more details?

If you want more details about phase noise, spectral linewidth, frequency stability, or how to wavelength tune your Koheras laser, we have some application notes for you.

Laser phase noise is a frequency-domain view of the noise spectrum around the laser signal. Read more about phase noise in single-frequency lasers.

Spectral linewidth is a measure of the spectral content of the laser light. Read more about linewidth measurement methods.

The laser’s frequency stability is often described in terms of its spectral linewidth. However, this term lacks detail about the laser frequency noise which is often critical in laser applications. Read the analysis of the laser frequency stability using beat-note measurements

Specifications

Choose model:
BASIK X15
BASIK E15
BASIK Y10
Laser emission
CW – inherently single frequency
CW – inherently single frequency
CW – inherently single frequency
Beam quality
M² < 1.05
M² < 1.05
M² < 1.05
Linewidth1)
< 0.1 kHz
< 0.1 kHz
< 20 kHz
Max phase noise @1 Hz (typical)
-105 dB((Rad/√Hz)/m)
Max phase noise @10 Hz
-125 dB((Rad/√Hz)/m)
-90 dB((Rad/√Hz)/m)
Max phase noise @100 Hz
-130 dB((Rad/√Hz)/m)
-110 dB((Rad/√Hz)/m)
Max phase noise @1 kHz
-128 dB((Rad/√Hz)/m)
Max phase noise @20 kHz
-130 dB((Rad/√Hz)/m)
Max phase noise @1 Hz (typical)
3.1 (µrad/√Hz)/m
Max phase noise @10 Hz
0.6 (µrad/√Hz)/m
32 (µrad/√Hz)/m
Max phase noise @100 Hz
0.3 (µrad/√Hz)/m
3.2 (µrad/√Hz)/m
Max phase noise @1 kHz
0.4 (µrad/√Hz)/m
Max phase noise @20 kHz
0.3 (µrad/√Hz)/m
RIN peak
App. 0.7 MHz
App. 0.7 MHz
App. 1.5 MHz
RIN level @ peak
<-100 dBc/Hz
<-100 dBc/Hz
<-105 dBc/Hz
RIN level @ 10 MHz
<-135 dBc/Hz
<-135 dBc/Hz
<-140 dBc/Hz
Optical S/N (50 pm res.)
> 50 dB (typ. > 55 dB) 2)
> 50 dB (typ. > 55 dB) 2)
65 dB (typ > 70 dB)
Min thermal wavelength
tuning range3)
± 125 pm
± 350 pm
± 240 pm
Total thermal tuning range
350 pm
1000 pm
680 pm
Fast wavelength
modulation range4)
 0.5 GHz
8 GHz
10 GHz
Fast wavelength modulation4)
< 20 kHz
< 20 kHz
< 20 kHz
PM output – PER4)
> 23 dB
> 23 dB
> 23 dB
Monitor optical output
FC/APC
FC/APC
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.

Chart by Visualizer
BASIK X15
BASIK E15
BASIK Y10
Dimensions (WxHxL)
91.2(111) x 22.5 x 220 mm
91.2(111) x 22.5 x 220 mm
91.2(111) x 22.5 x 220 mm
Weight
0.6 kg
0.6 kg
0.6 kg
Operating temperature range 1)
+15 to +60°C
+15 to +60°C
+15 to +60°C
Storage temperature, non-condensing
-20 to +60°C
-20 to +60°C
-20 to +60°C
Humidity
0-70% RH
0-70% RH
0-70% RH

1) Module temperature

BASIK X15
BASIK E15
BASIK Y10
Power supply requirements
12 VDC
12 VDC
12 VDC
Power consumption
Typical 4 W, max 10 W
Typical 4 W, max 10 W
Typical 4 W, max 10 W
Electrical interface
30 pin DIN41612 male
30 pin DIN41612 male
30 pin DIN41612 male
Fast modulation drive voltage
Differential 2×5 V w/ common-mode voltage at 2.5 V
Differential 2×5 V w/ common-mode voltage at 2.5 V
Differential 2×5 V w/ common-mode voltage at 2.5 V
Connectors – standard
FC/APC pigtailed
FC/APC pigtailed
FC/APC pigtailed
Connectors – option
Bulkhead/pigtailed FC/APC, SC/APC
Bulkhead/pigtailed FC/APC, SC/APC
Bulkhead/pigtailed FC/APC, SC/APC
Monitor output
Optional
Optional
Optional