Exalos Swept Source | ESS – 840nm
Applications

Description• Optical Coherence Tomography

The Exalos swept source (ESS) is a fiber-coupled turn-keylaser engine capable of fast wavelength sweep operation (1kHz to 150 kHz) over wide spectral range. The heart of theESS is a MEMS-based micro-optic swept laser module in ahermetically sealed 26-pin butterfly package. Its compact
and robust packaging enables high performance overbroad-based field deployment. Both bench-top instrument
and OEM-module versions are available.

• Bio-medical Imaging• Industrial metrology• Optical Sensing• Spectroscopy

Product FeaturesFeatures• High sweep frequency (up to 150 kHz)• Wide sweep range (up to 60 nm)• High output power (up to 12 mW)• Long ranging depth• Compact turn-key system• USB interface• Sweep trigger output• Average optical power monitoring• OEM versions available
Proprietary, patent-protected opticaldesign of the micro-optical swept laser
module. The entire laser cavity is sealed
within a 26-pin BTF package. Its
resonant MEMS mirror provides low
scan jitter and high phase stability.

EXALOS AG
Wagistrasse 21 CH-8952 Schlieren, Switzerland

Page | 1Tel. +41 43 444 60 90 Fax +41 43 444 60 99 sales@exalos.com www.exalos.com

ESSESS - 840nm0nm- 100kHz
100kHz/150k
Hz/150kHz/150kHz
Swept Source Parameters
Center Wavelength
Sweep Range (-10dB)
A-scan frequency1
2
Coherence length (in air)
6-dB Amplitude Fall-off
20-dB Amplitude Fall-off
Sweep duty cycle3
Average output power4

Swept Source Parameters
Center Wavelength
Sweep Range (-10dB)
A-scan frequency1
Coherence length (in air)2
6-dB Amplitude Fall-off
20-dB Amplitude Fall-off
3Sweep duty cycle
Average output power4

Operating temperature
Storage temperature
HumidityESD
Supply voltage
DimensionLaser Classification (per IEC60825-1)

Min
820
50
95 / 145

70
5

Typ84060
100 / 150
4/3
4/3
9/7
85
8

Max86070
115 / 155

ESSESS-840nm840nm-40kHzMin
Typ820
840
50
60
38
40
5511708558Operating Conditions
1025
525
5100
12Max
860
70
42100
1240
80
85500

Unitnmnm
kHzmmmmmm%mW

UnitnmnmkHzmmmmmm%mWoCC% r.h.
Vo100-240 V @ 50-60 Hz
261 x 181 x 78
Class 1M

Notes:
1 EXALOS’ MEMS architecture allows for realizing, upon request, A-scan frequencies from 1 kHz to above 150 kHz. The specified
range is due to slight variations in the fabrication process of the MEMS and not related to instabilities of the system. EXALOS will
deliver the ESS with a report specifying the exact sweep frequency, and this frequency remains stable over time. Up and down sweeps
can be considered identical but mirrored.
2 The coherence length is the optical path difference (OPD) at which the amplitude of the optical fringe signal drops to 50% of its
initial value for OPD=0 mm. Typically the so-called image depth is half the coherence length value.
3 The “sweep duty cycle” defines the relative portion of the sweep in either up or down direction that can be used for sampling andhence for the OCT scan. The maximum duty cycle is close to 100% (bidirectional scanning).
4 Under sweep operation. For a sweep duty cycle of 100%.

Ordering Information
Part Number: ESS320017ESS320017-00 : 840nm/150kHz/60nm/8mW/3mm - with k-clockPart Number: ESS320016ESS320016-00 : 840nm/100kHz/60nm/8mW/4mm - with k-clock
Part Number: ESS320028ESS320028-00 : 840nm/40kHz/60nm/8mW/5mm - with k-clock

EXALOS AG
Wagistrasse 21 CH-8952 Schlieren, Switzerland

Page | 2

Tel. +41 43 444 60 90 Fax +41 43 444 60 99 sales@exalos.com www.exalos.com