51nanoFI-S-1550-4-Q04-P-5-2-28-0-150

Fiber-coupled low coherence laser source with integrated Faraday isolator and polarization-maintaining fiber cable

51nanoFi-S

Faraday
Isolator

Features

The Laser Diode Beam Source of type 51nanoFI-S-1550-4-Q04-P-5-2-28-0-150 has a reduced power noise, a reduced coherence length and a low speckle contrast.

Reduced power noise: typ. < 0.05 % of P_o (RMS, Bandwidth < 1 MHz)
Reduced coherence length: coherence length ≈ 300 µm
Reduced speckle contrast
Wavelength: 1550 nm
Laser output power: 4 mW
Integrated Faraday isolator > 30 dB
Polarization-maintaining fiber cable
FC APC connector (8°-polish)
Modulation analog and TTL
With interlock and key switch (conform to EN 60825-1)

Alternative: Laser Diode Beam Source 51nanoFi-N (OEM version w/o key switch and w/o interlock)

Description

The fiber-coupled Laser Diode Beam Source of type 51nanoFI-S-1550-4-Q04-P-5-2-28-0-150 has a reduced power noise (typ. < 0.05 % of P_o (RMS, Bandwidth < 1 MHz)), reduced coherence length (≈ 300 µm) and a lowered speckle contrast.

Electrical features
The output power is adjustable using a potentiometer or using the two modulation inputs for analog and TTL.

Faraday isolator
The source has an integrated Faraday isolator in order to protect the laser from back reflections.

Fiber cable
The source is fiber-coupled to a polarization-maintaining fiber cable (standard, polarization extinction ratio ≥ 23 dB). As a result the beam profile is rotationally symmetric with Gaussian intensity distribution. The fiber cable is equipped with an FC APC type connector (8°-polish). The fiber cable has a strain-relief and a protective sleeving (Ø 3 mm). Standard cable length is 150 cm.

Options:

Single-mode fiber
Core-centered (single-mode only)
Other connector types including FC PC, DIN or AVIO, or E2000
Other fiber cable lengths
Incorporated vacuum feed-through

Laser safety
The laser safety is conform to IEC 825 / EN 60825-1.

Interlock chain for the remote deactivation of the laser
Laser power-up is only possible using the key switch
LED status indicator for “Laser ON”
For a quick start the laser is shipped with a interlock connector type BC0106F-iLCK

An OEM version is available as type 51nanoFi-N without key switch or interlock which is not conform to EN 60825-1.

A version without Faraday isolator is available here.

Technical data

51nanoFI-S-1550-4-Q04-P-5-2-28-0-150

Order Code

51nanoFI-S-1550-4-Q04-P-5-2-28-0-150

Series

51nanoFI-S (PM)

Laser class

Center Wavelength

1550 ± 20 nm

Bandwidth

0.7 - 4 nm

Output power

typ. 4 mW

Power adjustment

< 1 - 100 %

Power noise

typ. < 0.05 % of P_o (RMS, BW < 1 MHz)

Coherence length

≈ 300 µm

Isolation

> 30 dB

Fiber cable

polarization-maintaining

Fiber type

PMC-1300

Nominal fiber NA

0.12

Effective fiber NA_e²

0.077 ± 10 % (1/e²)

Mode field diameter MFD

12.8 µm ± 10 % (1/e²)

PER

≥ 23 dB

Fiber cable length

1.5 ± 0.05 m (standard)

Fiber cable type

Ø 3 mm with Kevlar strain-relief

Fiber connector type

FC APC (standard)

Power stability

max. 12 % power variation between 15°C and 35°C

Electronics type

Electr. cable length

1.5 ± 0.1 m (standard)

Connector type

3 pin (male, Lumberg SV30)

Supply voltage

5.0 ± 0.2 V

Max. current consumption*

260 mA

Modulation input connector

6 pin (male, Lumberg SV60)

Modulation inputs

TTL

Analog

Max. input voltage

5 V

Voltage for P_min / P_O

< 0.8 V / > 2.4 V

0 V / 2.5 V

Input impedance

22 kOhm

Max. modulation frequency

100 kHz

Time delay ON/OFF*

1.5/0.1 µs

2/0.3 µs

Rise / fall time*

1.0/1.0 µs

* Typical value. Depends on laser diode.

Operating temperature

15 - 35°C ± 0.5°C

Warm-up time

approx. 10 min

Air humidity

max. 90 % non-condensing

Casing Type

Weight

Dimensions (w/o base)

66 x 66 x 225 mm

Protection Class

IP30

Dimensions (for a complete dimensional drawing please refer to the downloads section)

Technotes

Downloads

090410090100.pdf (Dimensional drawing)

090410090100.stp (STEP model)

090410090100.stp (STEP model, for registered users only)

Conformity_51nano_2023_E_web.PDF (CE certificate)

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