LDM
4980
SeriesTelecom
Laser Diode
Mount

Internally
Modulated Lasers

CW or Direct Modulated Lasers
LDM-4982 DIL Laser Mount

Dual-In-Line (DIL)

Compatible with 14-pin DIL
laser modules, the LDM-4982
employs a zero insertion
force (ZIF) socket for ease-ofinstallation. This mount can beordered with the Type-A Bias-T
circuitry option.

LDM-4982M Mini-DIL Laser Mount

LDM-4984 14-pin Butterfly Mount

Compatible with 8-pin mini-DIL
laser modules, the LDM-4982M
employs a zero insertion
force (ZIF) socket for ease-ofinstallation. The mount comesstandard with case temperature
control.

The LDM-4984 is compatible with
14-pin butterfly laser modules.
Optionally, Bias-T circuits can beordered with Type-A or Type-B
configurations.

Mini-DILORDERING OPTIONS
TE-550BT-481
LFS-498

Case Temperature Control
Bias-T Modulation Circuitry
Laser Fiber Spool

Temperature Control Range: -5°C to 85°C1
Sensor Type:100k thermistor
Size (H x W x D):
39.39mm x 139.70mm
x 139.70mm
1.55" x 5.5" x 5.5"

14-Pin Butterfly
TE-550BT-482A
BT-482B
LFS-498

ORDERING OPTIONS

Case Temperature Control
Bias-T Modulation, Type A
Bias-T Modulation, Type B
Laser Fiber Spool

LDM-4983 13-pin (and 7-pin)
Butterfly Mount
The LDM-4983 is designed for“one-sided butterfly” packages
that have the modulation input
on one side and seven or
thirteen pins on the other side.
13/7-Pin 10 Gbits/s
These packages are typically
Packageused for 10 Gbits/s internally
modulated laser modules. A special electrical terminal
allows you to configure the potential of the hotplate andlaser module case (grounded, floating, or at a specified
potential).

1) Minimum temperature of 1.5 Watts

ORDERING OPTIONS
LFS-498

LDM-4986 Connectorized
Laser Mount

Connectorized (Flanged)

The LDM-4986 is compatible
with 3-pin and 4-pin can-type
and flanged lasers. Flanges
can be clamped to the hotplate
either vertically or horizontally.
The mount comes standard
with case temperature control.

LFS-498 Laser Fiber Spool

The LDM-4989 is designed for 20pin and 26-pin butterfly packages
such as wavelength tunable DFB
laser modules. Two standard 13pin socket sides are used on this
26/20-Pin Butterfly
mount, enabling the use of mostbutterfly packages with standard pin–spacing. For example,
on 20-pin packages with 7 pins on one side and 13 pins on
the other side, every other mount pin is wired on the 7-pin
side. Three 9-pin D-sub connector inputs are provided (1female and 2 male) for use with user-supplied custom cables.

The LDM-4984RF iscompatible with internal Bias-T
modulated 14-pin butterfly
laser modules. The speciallydesigned RF modulation
14-Pin Internal Bias-T input block interfaces a
Modulated
50 modulation source tointernally–modulated lasers with a 25 input impedanceon pin 12. A trim-capacitor is mounted on the RF blockto optimize the modulation characteristics for yourapplication. Pin configuration information is shown on thelast page of this datasheet.

The LFS-498 Fiber Management Spool

LFS-498

LFS-498

Laser Fiber Spool

Includes TE-550 Case Temperature Control
Laser Fiber Spool

LDM-4984RF 14-pin 2.5GHz
Butterfly Mount

LDM-4989T

ORDERING OPTIONS

LDM-4983T
LFS-498

Laser Fiber Spool

LDM-4989 26-pin (and 20-pin)
Butterfly Mount

ORDERING OPTIONSThe LDM-4980 series mounts stabilize temperature undera variety of load conditions.

ORDERING OPTIONS

Includes TE-550 Case Temperature
Control (Note: LDM-4989T option
reduces the number of input connector
pins available for laser control to 18.)
Laser Fiber Spool

MODULATION SPECIFICATIONSModulation Bandwidth:
Flatness to 2.5 GHz:
Max. Modulation Current:
Input Connector:
Laser Input Impedance:

10MHz to >2.5GHz±1.5dB
140mA rms
50 SMA
25

ORDERING OPTIONS
TE-550
LFS-498

Case Temperature Control
Laser Fiber Spool

The LFS-498 is an innovative fiber management toolcompatible with all the LDM-4980 Series Laser Diode
Mounts. The LFS-498 effortlessly attaches to the top of
the laser diode mount, organizing your benchtop or test
station and prevents inadvertent fiber damage.

LDM
4980
SeriesTelecom
Laser Diode
Mount

LDM
4980
SeriesTelecom
Laser Diode
Mount

Product Features

Specifications
INPUT CONNECTORS (EXCEPT 4989)

GENERAL

1) Laser Diode Current (Female 9-pin)2) Internal Laser Temp Control (Male 9-pin)
3) Mount Temperature Control Option (Male 9-pin)Size (HxWxD):
Size (with TE-550 option):

The LDM–4989 has three 9-pin connectors that are completelyuser–configurable.

Weight:

CASE TEMPERATURE CONTROL OPTIONSNOTESTemperature Control
Range:1
Sensor Type:TE Module Ratings:–5°C to 50°C
10 kΩ thermistor
Qmax = 14W
Imax = 6.0A
Vmax = 4.2V
∆Tmax = 70°C
Adds approx. 1.5” to width and0.3” to height

Size:

BIAS-T OPTION

Modulation Bandwidth2:
Input Impedance:
RF to DC Isolation:
VSWR:
Maximum DC Voltage:
Maximum RF Input Power:
Maximum DC Current:
Connector:

10–800MHz50Ω
40 dB min @ 10 MHz
1.2:1 typical
25V
20 dBm
500 mASMA

1

232mm x 102mm x 140mm
1.25” x 4.0” x 5.5”39mm x 140mm x
140mm
1.55” x 5.5” x 5.5”
0.64 kg (1.4 lbs)

Typical temperature control range at 20°C ambient. Actual
range will depend on thermal power from laser module,
ambient temperature, and whether or not the mount is affixed to
optical table (¼–20 screws included with TE-550 option).
Actual optical modulation bandwidth and flatness are dependent
upon laser used.

DIL, Butterfly, or connectorizedpackage versions
Easy insertion and removalof laser packages
Configurable laser pin-out

ORDERING INFORMATION
LDM-4982
LDM-4982M
LDM-4984
LDM-4986
LDM-4989
LDM-4989T
LDM-4983
LDM-4983T
LDM-4984RF
BT-481
BT-482A
BT-482B
LFS-498
MB-400TE-550NEW!
Mini-DIL version with casetemperature control

DIL Laser Mount
Mini-DIL Laser Mount with Case Temperature Control
14-pin Butterfly Mount
Connectorized Laser Mount
26-pin and 20-pin Butterfly Mount
Includes TE-550 Case Temperature Control
13-pin and 7-pin Butterfly Mount
Includes TE-550 Case Temperature Control
14-pin 2.5 GHz Butterfly Mount
Bias-T Option, 4982 only
Bias-T Option, 4984 only
Bias-T Option, 4984 only
Laser Fiber Spool
4980 Series Mounting Plate
Case Temperature Control Option

Standard laser current andtemperature control connectors
Bias-T modulation option(LDM-4982 and LDM-4984)
Case temperature
control option
Butterfly versions for 7-pin, 13pin, 14-pin, 20-pin, and 26-pin
packages

The LDM-4980 Series of Laser Diode Mounts provides acompact, easy-to-use solution for laser diode fixturing. Thesemounts are available in DIL, mini-DIL, butterfly, and connectorizedlaser diode package versions. Butterfly versions are available for7-pin, 13-pin, 14-pin, 20-pin, and 26-pin packages. This seriesof mounts accommodates most telecom laser module types
including CW, direct modulated (Bias-T), 2.5Gbits/s, 10Gbits/s,
and tunable DFB laser modules.
Each mount features ILX Lightwave’s standard 9-pin D-sub
input connectors with configurable pin designations to accommodate virtually any laser diode pin configuration. Zero insertion
force (ZIF) sockets and spring-loaded clamps facilitate ease of
mounting. Bias-T options include a 50Ω SMA input connector
and circuitry for directly modulating the laser drive current.
The TE-550 Case Temperature Control option is available forall of these laser diode mounts. Case temperature control is ideal
for applications requiring tight temperature stability or different
case temperatures or for testing laser diodes at a wider temperature range than can be accomplished with the internal TEC.
The LDM-4980 Series offers a high-value solution for demanding applications, such as laser diode testing and characterization,
and are ideal for use with ILX Lightwave instrumentation.

Bias–T and 2.5Gbits/s Pin Configuration Guide
Circuit Type

DIL

Butterfly

Butterfly

2.5Gbits/s Internally
Modulated Lasers
Butterfly–RF

Mount Option BT481

BT482A

BT482BLDM–4984RF

*
*
*
*
*
*
*
*

*
*
*
*
*
*
*
*
*
Las Anode/Case
Laser Cathode
*
*

*
*
*
*
*
*
*
Las Anode/Case
Las Anode/Case
Las Anode/Case
Las Anode/Case
Modulation (AC in)
Las Anode/Case

Package Type
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
PIN 6
PIN 7
PIN 8
PIN 9
PIN 10
PIN 11
PIN 12
PIN 13

Type A Bias–T

*
*
*
*
*
*
*
*

Laser CathodeLas Anode/Case
*
*
*
*
*
*

Type B Bias–T* User configurable pin assignment. All pins are configurable on other mount versions.

Compact, Convenient, and Flexible
Laser Diode Mounts

For information call
P.O. Box 6310, Bozeman, MT 59771 • FAX: 406-586-9405

www.ilxlightwave.com

1-800-459-9459
International Inquiries: 406-556-2481
email: sales@ilxlightwave.com

Rev05.102907

LDM
4980
SeriesTelecom
Laser Diode
Mount

LDM
4980
SeriesTelecom
Laser Diode
Mount

Internally
Modulated Lasers

CW or Direct Modulated Lasers
LDM-4982 DIL Laser Mount

Dual-In-Line (DIL)

LDM-4982M Mini-DIL Laser

Compatible with 14-pin DIL
laser modules, the LDM-4982
employs a zero insertion force(ZIF) socket for ease-of-installation. This mount can beordered with the Type-A Bias-T
circuitry option.

Mini-DIL

Compatible with 8-pin mini-DIL
laser modules, the LDM-4982M
employs a zero insertion
force (ZIF) socket for ease-ofinstallation. The mount comesstandard with case temperature
control.

ORDERING OPTIONS
TE-550BT-481
LFS-498

Case Temperature Control
Bias-T Modulation Circuitry
Laser Fiber Spool

Temperature Control Range: -5°C to 85°C
Sensor Type:100kΩ thermistor
Size (H x W x D):
39.39mm x 139.70mm
x 139.70mm
1.55" x 5.5" x 5.5"

ORDERING OPTIONS
LFS-498

LDM-4986 Connectorized
Laser Mount

Connectorized (Flanged)

The LDM-4986 is compatible
with 3-pin and 4-pin can-type
and flanged lasers. Flanges
can be clamped to the hotplate
either vertically or horizontally.
The mount comes standard
with case temperature control.

Laser Fiber Spool

ORDERING OPTIONS

Case Temperature Control
Bias-T Modulation, Type A
Bias-T Modulation, Type B
Laser Fiber Spool

ORDERING OPTIONS

Laser Fiber Spool

LDM-4983T
LFS-498

Includes TE-550 Case Temperature Control
Laser Fiber Spool

LFS-498 Laser Fiber Spool

The LDM-4989 is designed for 20pin and 26-pin butterfly packages
such as wavelength tunable DFB
laser modules. Two standard 13pin socket sides are used on this
26/20-Pin Butterfly
mount, enabling the use of mostbutterfly packages with standard pin–spacing. For example,
on 20-pin packages with 7 pins on one side and 13 pins on
the other side, every other mount pin is wired on the 7-pin
side. Three 9-pin D-sub connector inputs are provided (1female and 2 male) for use with user-supplied custom cables.

The LDM-4984RF iscompatible with internal BiasT modulated 14-pin butterfly
laser modules. The speciallydesigned RF modulation
14-Pin Internal Bias-T input block interfaces a
Modulated
50Ω modulation source tointernally–modulated lasers with a 25Ω input impedanceon pin 12. A trim-capacitor is mounted on the RF blockto optimize the modulation characteristics for yourapplication. Pin configuration information is shown on thelast page of this datasheet.

The LFS-498 Fiber Management Spool

LFS-498

LFS-498

14-Pin Butterfly
TE-550BT-482A
BT-482B
LFS-498

The LDM-4983 is designed for“one-sided butterfly” packages
that have the modulation input
on one side and seven or
thirteen pins on the other side.
13/7-Pin 10 Gbits/s
These packages are typically
Packageused for 10 Gbits/s internally
modulated laser modules. A special electrical terminal
allows you to configure the potential of the hotplate andlaser module case (grounded, floating, or at a specified
potential).

LDM-4984RF 14-pin 2.5GHz
Butterfly Mount

LDM-4989T

ORDERING OPTIONSThe LDM-4984 is compatible with
14-pin butterfly laser modules.
Optionally, Bias-T circuits can beordered with Type-A or Type-B
configurations.

LDM-4983 13-pin (and 7-pin)
Butterfly Mount

LDM-4989 26-pin (and 20-pin)
Butterfly Mount

ORDERING OPTIONSThe LDM-4980 series mounts stabilize temperature undera variety of load conditions.

LDM-4984 14-pin Butterfly Mount

Includes TE-550 Case Temperature
Control (Note: LDM-4989T option
reduces the number of input connector
pins available for laser control to 18.)
Laser Fiber Spool

MODULATION SPECIFICATIONSModulation Bandwidth:
Flatness to 2.5 GHz:
Max. Modulation Current:
Input Connector:
Laser Input Impedance:

10MHz to >2.5GHz±1.5dB
140mA rms
50Ω SMA
25Ω

ORDERING OPTIONS
TE-550
LFS-498

Case Temperature Control
Laser Fiber Spool

The LFS-498 is an innovative fiber management toolcompatible with all the LDM-4980 Series Laser Diode
Mounts. The LFS-498 effortlessly attaches to the top of
the laser diode mount, organizing your benchtop or test
station and prevents inadvertent fiber damage.

LDM
4980
SeriesTelecom
Laser Diode
Mount

LDM
4980
SeriesTelecom
Laser Diode
Mount

Product Features

Specifications
INPUT CONNECTORS (EXCEPT 4989)

GENERAL

1) Laser Diode Current (Female 9-pin)2) Internal Laser Temp Control (Male 9-pin)
3) Mount Temperature Control Option (Male 9-pin)Size (HxWxD):
Size (with TE-550 option):

The LDM–4989 has three 9-pin connectors that are completelyuser–configurable.

Weight:

CASE TEMPERATURE CONTROL OPTIONSNOTESTemperature Control
Range:1
Sensor Type:TE Module Ratings:–5°C to 50°C
10 k thermistor
Qmax = 14W
Imax = 6.0A
Vmax = 4.2V
Tmax = 70°C
Adds approx. 1.5” to width and0.3” to height

Size:

BIAS-T OPTION

Modulation Bandwidth2:
Input Impedance:
RF to DC Isolation:
VSWR:
Maximum DC Voltage:
Maximum RF Input Power:
Maximum DC Current:
Connector:

10–800MHz50
40 dB min @ 10 MHz
1.2:1 typical
25V
20 dBm
500 mASMA

1

232mm x 102mm x 140mm
1.25” x 4.0” x 5.5”39mm x 140mm x
140mm
1.55” x 5.5” x 5.5”
0.64 kg (1.4 lbs)

Typical temperature control range at 20°C ambient. Actual
range will depend on thermal power from laser module,
ambient temperature, and whether or not the mount is affixed to
optical table (¼–20 screws included with TE-550 option).
Actual optical modulation bandwidth and flatness are dependent
upon laser used.

DIL, Butterfly, or connectorizedpackage versions
Easy insertion and removalof laser packages
Configurable laser pin-out

ORDERING INFORMATION
LDM-4982
LDM-4982M
LDM-4984
LDM-4986
LDM-4989
LDM-4989T
LDM-4983
LDM-4983T
LDM-4984RF
BT-481
BT-482A
BT-482B
LFS-498
MB-400TE-550NEW!
Mini-DIL version with casetemperature control

DIL Laser Mount
Mini-DIL Laser Mount with Case Temperature Control
14-pin Butterfly Mount
Connectorized Laser Mount
26-pin and 20-pin Butterfly Mount
Includes TE-550 Case Temperature Control
13-pin and 7-pin Butterfly Mount
Includes TE-550 Case Temperature Control
14-pin 2.5 GHz Butterfly Mount
Bias-T Option, 4982 only
Bias-T Option, 4984 only
Bias-T Option, 4984 only
Laser Fiber Spool
4980 Series Mounting Plate
Case Temperature Control Option

Standard laser current andtemperature control connectors
Bias-T modulation option(LDM-4982 and LDM-4984)
Case temperature
control option
Butterfly versions for 7-pin, 13pin, 14-pin, 20-pin, and 26-pin
packages

The LDM-4980 Series of Laser Diode Mounts provides acompact, easy-to-use solution for laser diode fixturing. Thesemounts are available in DIL, mini-DIL, butterfly, and connectorizedlaser diode package versions. Butterfly versions are available for7-pin, 13-pin, 14-pin, 20-pin, and 26-pin packages. This seriesof mounts accommodates most telecom laser module types
including CW, direct modulated (Bias-T), 2.5Gbits/s, 10Gbits/s,
and tunable DFB laser modules.
Each mount features ILX Lightwave’s standard 9-pin D-sub
input connectors with configurable pin designations to accommodate virtually any laser diode pin configuration. Zero insertion
force (ZIF) sockets and spring-loaded clamps facilitate ease of
mounting. Bias-T options include a 50 SMA input connector
and circuitry for directly modulating the laser drive current.
The TE-550 Case Temperature Control option is available forall of these laser diode mounts. Case temperature control is ideal
for applications requiring tight temperature stability or different
case temperatures or for testing laser diodes at a wider temperature range than can be accomplished with the internal TEC.
The LDM-4980 Series offers a high-value solution for demanding applications, such as laser diode testing and characterization,
and are ideal for use with ILX Lightwave instrumentation.

Bias–T and 2.5Gbits/s Pin Configuration Guide
Circuit Type

DIL

Butterfly

Butterfly

2.5Gbits/s Internally
Modulated Lasers
Butterfly–RF

Mount Option BT481

BT482A

BT482BLDM–4984RF

*
*
*
*
*
*
*
*

*
*
*
*
*
*
*
*
*
Las Anode/Case
Laser Cathode
*
*

*
*
*
*
*
*
*
Las Anode/Case
Las Anode/Case
Las Anode/Case
Las Anode/Case
Modulation (AC in)
Las Anode/Case

Package Type
PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
PIN 6
PIN 7
PIN 8
PIN 9
PIN 10
PIN 11
PIN 12
PIN 13

Type A Bias–T

*
*
*
*
*
*
*
*

Laser CathodeLas Anode/Case
*
*
*
*
*
*

Type B Bias–T* User configurable pin assignment. All pins are configurable on other mount versions.

Compact, Convenient, and Flexible
Laser Diode Mounts

For information call
P.O. Box 6310, Bozeman, MT 59771 • FAX: 406-586-9405

www.ilxlightwave.com

1-800-459-9459
International Inquiries: 406-556-2481
email: sales@ilxlightwave.com

Rev06.092110

LDM
4980
SeriesTelecom
Laser Diode
Mount