785 nm Laser (Direct Diode; PM Fiber)

Select Fiber Termination:

Item Code:
Product status:
Full production Product specifications are stable. Delivery time is predictable.

785 nm diode laser is fiber coupled to a single-mode polarization-maintaining fiber. It can provide up to 130 mW optical power and has a polarization contrast of no less than 20 dB. Metal fiber jacket makes this laser really robust and reliable in every application.

By default, this type of laser is built with FC/PC connector, but other fiber terminations are available upon request. Details about non-standard connector and the fiber used with it should be discussed with the Integrated Optics sales team.

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/PC (PT): FC/PC has good insertion repeatability, therefore is often used in single-mode fiber applications. Features a key for polarization-maintaining fiber installations.
Last edited on:  25 April 2022
Parameter Minimum Value Typical Value Maximum Value
 Central Wavelength, nm 782 785 788
 Longitudinal modes - Multiple -
 Spectral line width FWHM, nm 0.02 0.5 2
 Output power, mW - 120 1 -
 Power stability, % (RMS, 8 hrs) 0.01 0.05 2 0.3
 Power stability, % (peak-to-peak, 8 hrs) 0.1 0.3 3 1
 Intensity noise, % (RMS, 20 Hz to 20 MHz) 0.05 0.25 4 0.6
 Transversal modes - TEM00 -
 M2 effective - 1.05 1.1
 Polarization direction - Aligned within the slow axis of the PM fiber and the key position. -
 Polarization extinction ratio (from PM fiber), dB 20 27 40
 Control interface type - UART 5 -
 Operation mode - APC (CW) -
 Modulation bandwidth, MHz - 10 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) 0.1 0.5 1
 Temperature stabilization - Internal TEC -
 External fan control - No 8 -
 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) 9 -
 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 optical power can be tuned from virtually 0% to 100%. However, other specifications, such as central wavelength, power stability, noise, polarization ratio, beam shape, quality and circularity are not guaranteed at power levels other than factory preset power. Significantly worse power stability is to be expected at very low power levels, e.g. <3% from specified nominal power.
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 Break-out-boxes AM-C8 and AM-C3 can be used for conversion of UART communication to either USB or RS232.
6 TTL digital modulation up to 10 MHz.
7 Excluding control interface pins and an output window/fiber assembly.
8 This function can be enabled in hardware only if the fast modulation option is disabled. The customer must specify this before ordering the laser.
9 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 Laser (Direct Diode; PM Fiber)
Typical spectrum of 0785 nm diode laser. Measured with 20 pm resolution.
Typical Near Field

Near field beam profile of 785 nm Laser (Direct Diode; PM Fiber)

Drawing of 785 nm Laser (Direct Diode; PM Fiber)
The key dimensions of a fiber-coupled MatchBox.