Datasheet
V25-850-HT

Up to 25 GBaud/s VCSEL (850nm)
for high temperature applications
Product Code:

V25-850-HT-C1

1x1 chip

V25-850-HT-C4

1x4 arrayContact type: SG / GS
Actual product may vary in appearance.

Engineering Samples
Product Description
These compact and high modulation rate high temperature top-emitting GaAs-based
vertical cavity surface emitting laser (VCSEL) chips and 1xN (N=4) arrays are available asengineering samples for use in the development and evaluation of optical interconnections,
optical backplanes and integrated waveguides, and next-generation optical data
communications systems. The VCSELs are contacted on the top-surface individually using
ground-source (GS) microprobes, wire bonds, or flip-chip bonds. This VCSEL revision
characterizes with very high temperature stability and can operate from 25°C to 125°C.

Features

Applications· Up to 4 parallel channels· Up to 28 Gbit/s NRZ per channel· High temperature stability· Device-to-device pitch of 250 µm· Suitable for wire or flip-chip bonding
Parameter
Emission wavelength
Data rate
Threshold current
Peak output power

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No. 190110-Rev 1.9· Ethernet· Automotive applications· Active Optical Cables (AOC)· Short-reach 50G/100G/200G/400G Ethernet· On-board signalling
TypicalNotes

850 nm(available 835 – 865 nm)
Up to 28 Gbit/s< 0.6 mA
6 mW

NRZ
25-125°C

VI Systems GmbH Hardenbergstrasse 7 D-10623 Berlin

January 2022

Datasheet
V25-850-HT
Electro-optical characteristics (T = 0 to 125 °C)
Parameter

SymbolEmission wavelength
Maximum data rate
Optical bandwidth

BRBW (f3dB)
Threshold current
Differential resistanceBeam divergence

IthRdPeak output powerPmax
RMS
RINxOMA
RINxOMA

Min

Typ835



Slope efficiency

Spectral bandwidth (RMS)
Relative Intensity NoiseTestCondition
NRZ
7 [mA]/25°C
25°C
125°C
25-125°C
25-125°C
FWHM
25°C
125°C

2818
0.6
0.4

0.5

Max

Unit

865

nm
Gbit/s
GHz
W/A

0.7
0.6mA
°
mW

100
202
163
0.5

25°C
125°C

-130-126

nm
dB/Hz
dB/Hz

Max

Unit

105180200250mA
V°C°C°C

Absolute Maximum Ratings
Parameter
Peak forward current
Maximum reverse voltage
Operating temperature
Storage temperature
Soldering temperature

SymbolTestCondition

IfVrv
TopTstTsl25°C

Min-40max 260
sec

All product specifications and descriptions are subject to change without notice.
Please contact our sales department for additional information and to receive a quotation: sales@v-i-systems.com

Optical spectrum

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No. 190110-Rev 1.9

L-I-V Diagram
VI Systems GmbH Hardenbergstrasse 7 D-10623 Berlin

January 2022

Datasheet
V25-850-HT
12

3

4

5

6

78

9

2.5

1E-4
1E-5

65
4

1.5

1E-6

1.0

1E-7

0.5

1E-8846 847 848 849 850 851 852 853 854 855 8560.0872.0U [V]Intensity [arb.u.]

0.001

25°C
90°C
125°C

103P [mW]

03.0210123456789010I [mA]

Wavelength [nm]Eye diagram at 25 Gbit/s NRZ 25°C

Eye diagram at 25 Gbit/s NRZ 125°C

Receiver: Textronix 80C15-32 GHz (no DSP)

Receiver: Textronix 80C15-32 GHz (no DSP)

Pulsed L-I Diagram
130120

Pulse Width: 100ns
Pulse Repetition Interval: 5µs

P [mW]

11025°C

1009080

85°C
105° C7060
50125°C

403020100020406080

100120140160I [mA]

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No. 190110-Rev 1.9

VI Systems GmbH Hardenbergstrasse 7 D-10623 Berlin

January 2022

Datasheet
V25-850-HT
Mechanical Dimensions
Parameter
VCSEL pitch
Length 1x1 VCSEL chip
Length 1x4 VCSEL array
HeightWidth

TypeMinAll
V25HT-850C1
V25HT-850C4
All
All

140

TypMax

Unit

250
210
960

250
1000

µmµm
µm

150
210

160
250µmµm

Dimensions

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No. 190110-Rev 1.9

VI Systems GmbH Hardenbergstrasse 7 D-10623 Berlin

January 2022

Datasheet
V25-850-HT
Qualification Notification
The V25-850-HT has been tested to meet specifications outlined in this data sheet at room temperature.
However, it has not undergone full qualification testing or characterization and therefore may not meet theperformance specifications over all extremes.

VI Systems GmbHHardenbergstrasse 710623 Berlin
Tel.: +49 30 3083143 30
Fax: +49 30 3083143 59
sales@v-i-systems.com
www.v-i-systems.com

www.v-i-systems.com
No. 190110-Rev 1.9

VI Systems GmbH Hardenbergstrasse 7 D-10623 Berlin

January 2022