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DFB / Narrow-Linewidth Lasers

Single Longitudinal Mode

Distributed-feedback single-mode lasers with narrow linewidth, high side-mode suppression and temperature-tunable wavelength, for coherent fiber sensing, TDLAS gas detection and precision metrology. 1310–2050 nm coverage, butterfly / TO packages.

1310–2050 nm

WAVELENGTH COVERAGE

>45 dB

SMSR

<2 MHz

TYPICAL LINEWIDTH

≤100 mW

OUTPUT POWER

Submit RFQ → Datasheets

EMISSION SPECTRUM · 1550 nm

L-I-V CURVE

Overview

Specifications

Drawings

Downloads

Accessories

Part Numbering

Each field has a fixed meaning — part numbers are readable at a glance and configurable. Example: DFB-1550-NLW-BF-PM

DFB

Device type

DFB / SLD / PUMP / PD

1550

Center wavelength (nm)

1310 / 1550 / 1653 …

NLW

Series / grade

NLW narrow / HP high-power / STD

Package

BF butterfly-14 / TO / CM

Fiber

PM / SM

Models in this family

Part number	Wavelength	Power	Linewidth	Package	Fiber	Datasheet
DFB-1310-NLW-BF	1310 nm	10 mW	<2 MHz	Butterfly-14	PM	PDF ↓
DFB-1550-NLW-BF	1550 nm	20 mW	<2 MHz	Butterfly-14	PM	PDF ↓
DFB-1550-HP-BF	1550 nm	100 mW	<5 MHz	Butterfly-14	SM	PDF ↓
DFB-1653-CH4-BF	1653 nm	10 mW	SMSR>40dB	Butterfly-14	SM	PDF ↓

Specifications — DFB-1550-NLW-BF (representative)

OPTICAL
Parameter	Symbol	Min	Typ	Max	Unit
Center wavelength ^a	λc	1545	1550	1555	nm
Output power (CW) ^b	Po	20	—	—	mW
Linewidth ^c	Δν	—	2	—	MHz
Side-mode suppression	SMSR	35	45	—	dB
Wavelength temperature coefficient	Δλ/ΔT	—	0.09	—	nm/°C

ELECTRICAL
Parameter	Symbol	Min	Typ	Max	Unit
Threshold current	Ith	—	15	25	mA
Operating current	Iop	—	—	200	mA
Forward voltage	Vf	—	1.3	1.8	V
Slope efficiency	ΔP/ΔI	—	0.15	—	W/A
Monitor current	Ipd	—	0.5	—	mA

ABSOLUTE MAXIMUM
LD reverse voltage	2	V
TEC current	1.5	A
Operating case temperature	-55~+85	°C
Storage temperature	-40~+85	°C

FIBER
Fiber type	PM1550 / SMF-28e
Mode-field diameter (MFD)	10.4 ± 0.5 µm
Connector	FC/APC
Pigtail length	1.0 m (customizable)

FULL-TEMPERATURE STABILITY (case −55 to +85 °C)
Power variation over temperature	< 5	%
Wavelength variation over temperature	< 0.5	nm
Wavelength tuning coefficient	0.09	nm/°C

^a Tcase = 25 °C at operating point. ^b CW, constant current. ^c Measured by OSA at 0.02 nm resolution; narrow-linewidth grades verified by self-heterodyne. Guaranteed values for each unit are given in its serialized test report (see Tools → Serial Lookup).

Package Drawing · Butterfly 14-pin (BF)

Pin-out, TO package drawings and 3D STEP models are under the Downloads tab. All drawings are open — no registration required.

Downloads

● All open — no registration / no email wall DFB / Narrow-Linewidth Laser Datasheet
PDF · EN/中文 · Rev BDownload ↓ Butterfly 14-pin Package Drawing + Pin-out
PDF · mechanical drawingDownload ↓ 3D Model (STEP)
STEP · butterfly packageDownload ↓ Sample Factory Test Report
PDF · with spectrum / LIV curvesDownload ↓

Need the measured report for your specific unit? Go to Tools → Serial Lookup and enter its serial number + verification code.

Accessories & Compatible Drivers

Butterfly Mount / TEC Base

Fits 14-pin butterfly packages; TEC control and monitor pins broken out.

Laser Driver + TEC Controller

Constant-current / constant-power drive with TEC control, for all butterfly devices in this family.

Collimation / Coupling Accessories

C-lens collimators, FC/APC patch cords, PM adaptation.

Gas Reference Cells (CH₄/CO₂…)

Pair with gas-sensing DFBs (e.g. 1653 nm) for a TDLAS reference channel.

※ Sample page: figures are typical industry-class values; part-number structure reflects real production data. Final specifications pending engineering approval.