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NIR Picosecond Lasers

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The QLD-301 is a direct-pulsed diode laser system featuring adjustable pulse width, low time jitter, high extinction ratio and high repetition frequency. The minimal pulse width is less than 50 ps but also can be adjusted to a large extent up to 1.5 ns duration for user-specific applications. With minimal short pulse, the repetition rate can go up to 1.25 GHz. Laser pulses can be triggered internally or externally with built in precision delay control. A sync output and a programmable clock output allow to trigger other components such as a TCSPC or testing electronics for single photon system.


With built-in EVOA and PD, the optical power and be adjusted easily and shown on the screen for quantum optical applications. Besides pulsed laser mode, continuous wave mode is also supported, of which average power can be set and monitored as well.


Product Highlights

Applications

·          Minimal pulse width ≤ 50 ps, FWHM

·          Quantum optics, weak coherent pulse

·          Laser pulse jitter ≤ 20 ps, RMS

·          Heralded single photon generation

·          Optical extinction ratio ≥ 40 dB

·          Single photon detector testing system

·          High repetition frequency up to 1.25 GHz

·          Fluorescence lifetime and fluorescence spectroscopy

·          Internal/external trigger selection with adjustable trigger delay

·          Laser ranging system

·          Laser sync output and programmable clock output

·          Time-resolved single molecule spectroscopy

·          Reference clock input and output

·          Quantum optics, weak coherent pulse

·          7” IPS touch screen and graphical user interface




Optical Specifications

 

PARAMETER

MIN

TYP

MAX

UNIT

Laser Output (FC/PC x1)

Pulsed Laser Mode

repetition frequency

single shot


1250

MHz

minimal pulse width


30

50

Ps, FWHM

adjustable pulse width [1]

0.1


1.5

ns

pulse width resolution


100


ps

time jitter


15

20

ps, RMS

-3dB bandwidth


0.06

0.1

nm

extinction ratio

40

50


dB

maximum peak power [2]



1.5

mW

CW Laser Mode

average power adjustment range

-48


-13

dBm

wavelength tuning resolution


0.1


Pm

wavelength short term stability [3]



10

MHz, RMS

Optical Attenuator and Power Monitor

power monitor sensitivity


-75


dBm

internal attenuation

0


35

dB

 

External Trigger Mode (pulsed laser mode only)

 

PARAMETER

MIN

TYP

MAX

UNIT

Trigger Input (SMA x1)

trigger frequency

single shot


1250M

Hz

trigger input voltage range

-5


5

V

trigger input duty cycle

40


60

%

trigger input threshold

-2.5


2.5

V

trigger impedance, DC-coupled


50


trigger delay range


10


ns

trigger delay resolution


10


ps

Sync Output (SMA x1)

output voltage, ac coupled [4]


400


mVpp

output impedance


50


output duty cycle

40


60

%

 

Internal Trigger Mode (pulsed laser mode only)

 

PARAMETER

MIN

TYP

MAX

UNIT

Internal Trigger

trigger frequency


1,2,5,10,20,40,50,100,

200,500,1000,1250


MHz

trigger delay range


1


us

trigger delay resolution


10


ps

Sync Output (SMA x1)

output voltage, ac coupled [4]


400


mVpp

output impedance


50


output duty cycle


50


%

Programmable Dock Output (SMA x1)

output voltage, ac coupled [4]


400


mVpp

output impedance


50


output duty cycle


50


%

output frequency

1


1250

MHz

Reference clock input (SMA x1)

input voltage range

-5


5

V

input duty cycle

40


60

%

input threshold

-2.5


2.5

V

input impedance, DC-coupled


50


input clock frequency


100


MHz

Reference clock output (SMA x1)

output voltage, ac coupled [4]


1500


mVpp

output clock frequency


100


MHz

Note:

[1] The maximum adjustable pulse width is limited to 1ns when repetition frequency is more than 200MHz, and the pulse width is fixed to the minimal (<50ps) when frequency is more than 400MHz.

[2] Maximum peak power may be reduced by adjusting the internal attenuator.

[3] Wavelength short term stability condition: 25℃ after 20 min warm up, 1000 sec.

[4] Output voltage is specified with 50-ohm termination.

 

Hardware Specifications

 

PARAMETER

MIN

TYP

MAX

UNIT

Operating temperature

10


40

Power Supply

100-240VAC 50/60Hz


Power Consumption



65

W

Dimensions (WxDxH)

300 x 388.6 x 146.3

mm

Net Weight

7.5

kg



Typical Measurements

 

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Minimal Pulse Width, 1.25GHz repetition rate          1ns pulse width, 200MHz repetition rate

             

Dimensions (unit: mm)

 

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We are able to customize the wavelength range from 1530–1565nm, as well as other specification, if you have special request regards to the laser please contact us


Notes:


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