785 nm Narrow Linewidth Laser (HP VBG Diode; MM Fiber)

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Item Code:
0785L-44A-NI-AT-NF
Product status:
Full production Product specifications are stable. Delivery time is predictable.
Availability:

Description
High power 785 nm narrow spectrum laser for industrial Raman applications. Fiber coupled to a multimode fiber which results in circular, nearly top-hat homogeneous beam output. This high-power SLM laser found its applications in industrial Raman Spectroscopy and other sensing applications.
Despite its high output power, this ultra-compact self-contained laser module can be used the same way as any other laser in the MatchBox series. Stainless steel fiber jacket ensures robustness in harsh industrial environments. This 785 nm unit features good center wavelength stability and wide operational temperature range.

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.
Fiber Termination - FC/APC (AT): 8° polishing angle minimizes back reflections from fiber tip. This is necessary especially for SLM lasers.
Specifications
Last edited on:  25 April 2022
Parameter Minimum Value Typical Value Maximum Value
 Central Wavelength, nm 784.5 785 785.5
 Longitudinal modes - Narrow Spectrum -
 Spectral line width FWHM, pm 30 50 80
 Output power, mW - 800 1 1100
 Side-mode suppression ratio (SMSR), dB 40 50 60
 Power stability, % (RMS, 8 hrs) - 0.05 2 0.5
 Power stability, % (peak-to-peak, 8 hrs) - 2 3 3
 Intensity noise, % (RMS, 20 Hz to 20 MHz) - 0.3 4 1
 Transversal modes - Multiple -
 Operation mode - APC (CW) -
 Modulation bandwidth, MHz - N/A 5 -
 Control interface type - UART 6 -
 Input voltage, VDC 4.8 5 5.3
 External power supply requirement - +5 V DC, 1.5 A -
 Dimensions, mm - 50 x 30 x 18 7 -
 Fiber Length, m 0.95 1 1.1
 Heat-sinking requirement, °C/W - 1 -
 Optimum heatsink temperature, °C 15 20 30
 Warm up time, mins (cold start) 0.2 1 2
 Temperature stabilization - Internal TEC -
 Overheat protection - Yes -
 Storage temperature, °C (non-condensing) -10 - 50
 Net weight, kg 0.1 0.12 0.14
 Max. power consumption, W 0.4 2 10
 Warranty, months (op. hrs) - 14 (10000) 8 -
 RoHS - Yes -
 CE compliance - - General Product Safety Directive (GPSD) 2001/95/EC
- (EMC) Directive 2004/108/EC
-
 Laser Safety Class - 3B -
 OEM lasers are not compliant with - IEC60825-1:2014 (compliant using additional accessories) -
 Country of origin - Lithuania -
1 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.
2 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.
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 Noise level is measured with a fast photodiode connected to an oscilloscope. The overall system bandwidth is from 2 kHz to 20 MHz.
5 SLM lasers shall not be modulated - use external modulators instead.
6 Break-out-boxes AM-C8 and AM-C3 can be used for conversion of UART communication to either USB or RS232.
7 Excluding control interface pins and an output window/fiber assembly.
8 Whichever occurs first. The laser has an integrated operational hours counter.
Note: Product specifications are subject to change without prior notice to improve reliability, function or design or otherwise.
Typical spectrum

Spectrum of 785 nm Narrow Linewidth Laser (HP VBG Diode; MM Fiber)
Typical spectrum of 0785 nm diode laser. Measured with 20 pm resolution.
Typical Near Field

Near field beam profile of 785 nm Narrow Linewidth Laser (HP VBG Diode; MM Fiber)
Drawing

Drawing of 785 nm Narrow Linewidth Laser (HP VBG Diode; MM Fiber)
The key dimensions of a fiber-coupled MatchBox.