Exalos Swept Source | ESS – 1550nm
1550nmApplications

Description• Fiber-Optic Sensing

The Exalos swept source (ESS) is a fiber-coupled turn-key
laser 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.

• Frequency Domain Ranging• Optical Coherence Tomography• Bio-medical Imaging• Industrial metrology• Spectroscopy

Product FFeatureseatures• Sweep frequency (>2 kHz)• Wide sweep range (> 100 nm)• High output power (up to 15 mW)• 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 | 1

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

ESSESS - 1550nm1550nm- 150kHz
150kHzSwept 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
Linewidth

Min
1530
90
145

70
5Typ1550
100
150
44885
10250

Max
1570
155

100UnitnmnmkHzmmmmmm%mWpm

ESSESS - 1550nm1550nm- 2kHz/2
2kHz/20kHz
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
3
Sweep duty cycle
4
Average output power
Linewidth

Min
1530
110
1.8/1870
10

Typ1550
150
2/20
10/8
10/8
22/18
85
15100/150

Max
1570

2.2/22

100

Operating Conditions (Bench(Bench-Top Instrument)
Operating temperature
102540Storage temperature
52580
Humidity
585
ESD500
Supply voltage
100-240 V @ 50-60 HzDimension
261 x 181 x 78
Laser Classification (per IEC
Class 1M60825-1)

Unitnmnm
kHzmm
mm
mm%mWpmoCC% r.h.
VoNotes:
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: ESS320030
ESS320030--00 : 1550nm/150kHz/100nm/10mW/4mm - with k-clock
Part Number: ESS320025ESS320025-00 : 1550nm/20kHz/150nm/15mW/8mm - with k-clock
Part Number: ESS320029ESS320029-00 : 1550nm/2kHz/150nm/15mW/10mm - with k-clock

EXALOS AG
Wagistrasse 21 CH-8952 Schlieren, Switzerland

Page | 2Tel. +41 43 444 60 90 Fax +41 43 444 60 99 sales@exalos.com www.exalos.com