THORLABS Redstone OSA305 Manual

Optical Spectrum Analyzers Chapter 4: Description
Page 9 STN053070-D02
Figure 3. Resolution as a Function of Wavelength
The sensitivity of the instrument depends on the electronic gain used in the sensor electronics. Since an
increased gain setting reduces the electrical bandwidth of the detectors, the instrument will run slower when
higher gain settings are used. Figure 4 and Figure 5 show the dependence of the noise floor on the wavelength
and OSA model.
Figure 4. Noise Floor in Absolute Power Mode, i.e., the mode for measuring narrowband light sources
024681012
10
0
10
1
10
2
10
3
10
4
10
5
OSA20xC, High
OSA20xC, Low
OSA305, Low
OSA305, Medium Low
OSA305, Medium High
OSA305, High
Resolution in Spectrometer Mode
Resolution (pm)
Wavelength (µm)
110
-105
-95
-85
-75
-65
-55
-45
OSA305
OSA201C
OSA205C
OSA203C
OSA207C
OSA202C
OSA Noise Floor in Absolute Power Mode
Noise Floor (dBm)
Wavelength (µm)
0.3 20

THORLABS Redstone OSA305 Specifications

General

Brand	THORLABS
Model	Redstone OSA305
Category	Measuring Instruments
Language	English