A350 – Diode Lasers with Ultra-fast Analogue Modulation

High Speed analogue modulated laser diode modules with up to 350MHz@-3dB

Bluephoton® A350 Series – 375 nm – 488 nm
Greenphoton® A350 Series – 515 nm
Redphoton® A350 Series – 635 nm – 1060 nm

Specifications A350-Models

Blue- / Greenphoton® A350

Redphoton® A350

Wavelengths & Powers
(other wavelengths and powers on request)

Single-Mode (SM):
375nm / 20mW
375nm / 70mW
395nm / 120mW
405nm / 55mW
405nm / 120mW
405nm / 300mW
415nm / 120mW
425nm / 120mW
445nm / 50mW
445nm / 100mW
457nm / 100mW
460nm / 100mW
473nm / 20mW
473nm / 80mW
473nm / 100mW
488nm / 20mW
488nm / 60mW
488nm / 80mW
488nm / 100mW
488nm / 150mW
488nm / 200mW
515nm / 25mW
515nm / 50mW
515nm / 80mW
Multi-Mode (MM):
375nm / 200mW (M² = 7...8)
405nm / 400mW (M² = 5...6)
445nm / 500mW (M² = 2...3)

Single-Mode (SM):
635nm / 5mW
637nm / 150mW
639nm / 40mW
643nm / 150mW
647nm / 150mW
658nm / 130mW
670nm / 15mW
685nm / 35mW
785nm / 120mW
808nm / 200mW
830nm / 200mW
852nm / 150mW
980nm / 150mW
1016nm / 100mW
1060nm / 100mW
Multi-Mode (MM):
638nm / 250mW
and much more

Beam diameter
(other diameters on request)

1.25mm (1/e²) +/- 0.25mm
(MM beam diameter may vary)

1.25mm (1/e²) +/- 0.25mm
(MM beam diameter may vary)

Beam quality M²

<1.2 (SM)
<6 (MM)

<1.2 (SM)
<6 (MM)

Astigmatism (corrected)



Beam ellipticity

<1.1:1 (SM)

<1.1:1 (SM)


>100:1 vertical

>100:1 vertical

Power stability

<0.5% / h

<0.5% / h

Noise 0Hz-100MHz

<0.5% peak<>peak (CW)

<0.5% peak<>peak (CW)

Modulation speed

Analog: up to 350MHz @ -3dB
Digital: >350MHz

Modulation input signals

Analog: 0...1V / 50 Ohm
Digital: 0...1V / 50 Ohm with programmable trigger-level
peak power control: 0....4V -> 0...100% with 1.5Hz bandwidth

Rise- and falltime

Analog: <2ns
Digital: <1ns

Extinction ratio

>250 : 1

Supply voltage

85-245VAC, 50/60Hz


RS-232 interface


LDM.COL - collimator objective
LDM.FOC - customized focussing objective
LDM.FASY.XXX - fibre coupling unit
LDM.AAC - Automatic Aging Compensation
LDM.MON - high-speed light monitoring

The diode lasers of the Bluephoton® / Greenphoton® / Redphoton® A350 Series are temperature-stabilized with high-speed analog modulation of up to 350 MHz @ -3 dB. For all applications which require fast analog modulation, the lasers of the A350 Series represent a genuine alternative to gas lasers with AO modulators. Through the extreme short rise and fall times of the analog modulation of <2 ns (nanoseconds), analog illumination processes, such as for example data storage, in CD and DVD mastering and microlithography, as well as microscopy, are considerably speeded up and are also considerably more precise. Furthermore, the very low jitter and the linear characteristics of the analog modulation make the control of the process parameters more reproducible by a multiple. In addition to the analog RF input with 0 … 1 /50 Ohm, the laser also has a digital modulation input with up to 500 MHz modulation bandwidth, which can be used in combination with the analog input. As a result of their intelligent laser controller with interface RS-232, these lasers can be integrated seamlessly into applications and controlled. Through the standardized “Command Line Interface” (CLI), you have at all times full control of all parameters of the laser, such as for example, laser diode temperature, laser powers and currents, operating modes and lots more.
The systems consist of a laser head and a laser controller in the EMC-screened modular housing and a low-noise power supply unit with an input voltage of 90-240 V, 50/60 Hz. As in case of all lasers of the Bluephoton® and Redphoton® Series, the laser head can be very simply adapted to customer specifications by the use of the modular principle.

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