405 nm SLM Laser

Item Code: 0405L-21A-NI-NT-NF
VBG Diode Free-space
Filter
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Description

High-performance 405 nm single longitudinal mode (SLM) laser, designed with precision for applications in Raman scattering and fluorescence studies. This laser provides a stable and narrow linewidth output at a 405 nm wavelength. Its meticulously engineered single-mode characteristics make it an ideal tool for these precise applications. Laser offers a powerful and reliable solution for researchers and scientists. Its lower power output allows for gentle and controlled excitation of molecular vibrations and fluorescence, without causing sample damage. Whether you're delving into material analysis or probing the intricate world of biomolecules, this laser empowers you with the accuracy and versatility required for groundbreaking discoveries in these fields.

This model of SLM 405 nm laser is widely used in compact Raman spectrometers. Small footprint and +5 VDC operating voltage is exactly what's needed for handheld portable devices. Integrated precision driver electronics ensure low-noise and stable operation throughout the wide temperature range. 405 nm radiation features high-energy photons, therefore much lower power is enough for efficient excitation of fluorescence or Raman scattering.

This free-space laser can be supplied with an integrated clean-up filter. 

Note:
In optical systems with strong back-reflections (e.g. more than 10%), the laser must be protected by using an optical isolator with at least 20 dB isolation. Typical applications include interferometry, confocal microscopy (especially working with reflective samples), etc. Failure to comply with these requirements will render the warranty void for cases of COD (Catastrophic Optical Damage) of laser diode facets.

Last edited on: 25 January 2024
Parameter Minimum Value Typical Value Maximum Value
 Central wavelength, nm 404.5 405 405.4
 Spectral line width FWHM, MHz 1 - 20 60
 Output power, mW 2 - 50 -
 Power stability, % (RMS, 8 hrs) 3 0.02 0.05 0.2
 Power stability, % (peak-to-peak, 8 hrs) 4 0.1 0.3 1
 Intensity noise, % (RMS, 20 Hz to 20 MHz) 5 0.1 0.2 0.6
 Side-mode suppression ratio (SMSR), dB - 50 -
 Longitudinal modes - Single -
 Transversal modes - TEM00 -
 Beam width (1/e2), mm 6 - 0.9 1.4
 Beam height (1/e2), mm - 1.3 1.7
 Horizontal beam divergence, mrad - 0.9 1.5
 Vertical beam divergence, mrad - 0.5 1
 M² horizontal axis - 1.2 1.4
 M² vertical axis 7 - 1.3 2.0
 M² effective - 1.3 1.6
 Polarization direction 8 - Horizontal -
 Polarization contrast 1000 2000 -
 Control interface type 9 - UART -
 Operation mode 10 - APC (CW) -
 Modulation bandwidth, MHz 11 - N/A -
 Input voltage, VDC 4.8 5 5.3
 Input current, A - 1.5 -
 Max. power consumption, W 0.4 2 10
 Heat-sinking requirement, °C/W - 1 -
 Optimum heatsink temperature, °C 20 25 30
 Warm up time, mins (cold start) 0.2 1 2
 Temperature stabilization - Internal TEC -
 External fan control - Yes -
 Overheat protection - Yes -
 Storage temperature, °C (non-condensing) -10 - 50
 Beam height from the base, mm 9.9 10.4 10.9
 Dimensions (WxDxH), mm 12 - 50 x 30 x 18 -
 Net weight, kg 0.1 0.12 0.14
 Laser safety class - 3B -
 RoHS - Yes -
 CE compliance - - General Product Safety Directive (GPSD) 2001/95/EC
- (EMC) Directive 2004/108/EC
-
 OEM lasers are not compliant with - IEC60825-1:2014 (compliant using additional accessories) -
 Warranty, months (op. hrs) 13 - 14 (10000) -
 Country of origin - Lithuania -
 Spectral line width FWHM, pm 14 - 0.01 0.03

1 Measured with a scanning Fabry-Perot interferometer having 7.5 MHz resolution, with scanning frequency of about 10 Hz. Interferometer testing is not provided for each laser being manufactured, the standard test is OSA measurement with 20-30 pm resolution instead.

2 The output power of SLM lasers shall not be tuned and SLM performance is not guaranteed at power ratings other than factory preset. However, the power setting capability is not disabled. External attenuators are recommended instead.

3 The long term power test is carried out at constant laser body temperature (+/-0.1 ‎°C) using an optical power meter with an input bandwidth of 10 Hz. The actual measurement rate has a period of about 20 seconds to 1 minute.

4 The long term power test is carried out at constant laser body temperature (+/-0.1 ‎°C) using an optical power meter with an input bandwidth of 10 Hz. The actual measurement rate has a period of about 20 seconds to 1 minute.

5 Noise level is measured with a fast photodiode connected to an oscilloscope. The overall system bandwidth is from 2 kHz to 20 MHz.

6 Beam width and height are measured at 0.4 m from output aperture.

7 The beam of this laser usually contains small artifacts, which make the M2y measurement worse. The beam quality improvement on Y-axis (vertical) is possible by sacrificing some output power (up to 30% loss of power). However, in applications where SM fiber coupling is needed, even at M2y=2.0 we guarantee that 50% of radiation will be coupled into the fiber.

8 For lasers without integrated optical isolators.

9 Break-out-boxes AM-C8 and AM-C3 can be used for conversion of UART communication to either USB or RS232.

10 APC - Automatic Power Control.

11 SLM lasers shall not be modulated - use external modulators instead.

12 Excluding control interface pins and an output window/fiber assembly.

13 Whichever occurs first. The laser has an integrated operational hours counter.

14 Converted from bandwidth value.

Typical spectrum

Typical spectrum of 0405 nm diode laser. Measured with 10 pm resolution.

Spectrum of 405 nm SLM Laser
Typical spectrum with an integrated clean-up filter

Typical spectrum of 0405 nm diode laser with an integrated clean-up filter. Measured with 10 pm resolution.

Spectrum of 405 nm SLM Laser with an integrated clean-up filter
Drawing

The key dimensions of a free-space MatchBox.

Drawing of 405 nm SLM Laser
Typical Near Field

Typical near field (0.45 m from output aperture) beam profile. Non-circularized beam of a 0405 nm direct diode laser.

Near field beam profile of 405 nm SLM Laser
Typical Far Field

Typical far field (1 m from output aperture) beam profile. Non-circularized beam of a 0405 nm direct diode laser.

Far field beam profile of 405 nm SLM Laser
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