LWA-1k Series
Linewidth Analyzer
The LWA-1k features a superb sensitivity allowing the analysis of lasers with very narrow linewidths down to 2 kHz. Intrinsic linewidth can even be resolved down to 350 Hz.
Additionally, the signal generated by the 1k models can be used in combination with a fast feedback controller to actively reduce the laser frequency noise.
An intuitivly usable and responsive GUI provides the user with noise density and lineshape plots as well as the significant linewidth values.
Wavelength Range
min.
typ.
max.
1530 – 1625 nm
1530 nm
1550 nm
1625 nm
Required Input Power 1)
0.5 – 8 mW
0.5 mW
5 mW
8 mW
Input Power Stability
± 5 %
1) Best performance with maximum input power. Noise sensitivity scales inversly with input power.
Analyzer Unit
Laser type
CW and single-mode
Input type
PM-FC/APC fiber
Spectral and Frequency Noise Specifications
Frequency noise bandwidth
10 Hz – 10 MHz
Frequency noise sensitivity
< 10 Hz/√Hz – 10 MHz/√Hz
Intrinsic linewidth range 3)
< 350 Hz
Effective linewidth 2)range (β-separation)
< 1 kHz – 20 MHz
Relative intensity noise limit
−150 dB/Hz
Lineshape Specifications
Effective linewidth 2)range (FWHM)
< 1 kHz – 10 MHz
Dynamic range
60 dB
Miscellaneous
Interface
USB 2.0 Type B
Analog Output/ error signal 4)
BNC ± 7.5 (50 Ω) ± 15 (high impedance) V, single ended
Cutoff (highpass filter)
10 Hz, 1 kHz, 10 kHz, 100 kHz
Dimensions
220 mm × 334 mm × 96 mm
Weight
8 kg
Digitizer Unit
Sample rate
62.5 (max.) Sa/s
Resolution
16 bits Acquisition time
0.1 (typ.) s
Evaluation time
< 1 (typ.) s
Miscellaneous
Communication
USB 3.0 type B
Dimensions
210 mm × 200 mm × 74 mm
Weight
2 kg
Software
Operating system
Microsoft® Windows® 10, 64 Bit
CPU (minimum)
Intel® Core™ i5 or equivalent
Memory (minimum)
8 GB
Graphical evaluation options
Frequency noise density spectrum, lineshape spectrum,intrinsic (Lorentzian) linewidth, effective (optical) linewidth
2) Effective linewidth: Combination of intrinsic linewidth and additional broadening mechanisms (thermal, electronical and acoustic noise).
Determination by β-separation method (noise density spectrum) or curvefitting procedure (lineshape spectrum).
3) Intrinsic linewidth: Limited by fundamental quantum processes and laser design. Determined by the noise floor (white noise) of the
frequency noise spectrum and calculated by: noise density (in Hz²/Hz) times π (rule of thumb). This value is most commonly denoted as
“laser linewidth” by laser manufacturer.
4) Linewidth reduction/control: Analog output as error signal for use in combination with PID controller (not included) for frequency noise
or RIN reduction.
商品属性 [波长范围] 1530 – 1625 nm