ILX Lightwave LDM-4980 Series Laser Diode Mount

Description

ILX Lightwave LDM-4980 Series Laser Diode Mount.
Has the Bias-T option accepts a 50 ohm impedance-matched modulation input through a standard SMA RF connector.
Additional information and photos available upon request.
Product Overview
The LDM-4980 Series of laser diode mounts provides a compact, easy-to-use solution for laser diode fixturing. These mounts are available in DIL, Mini-DIL, butterfly and connectorized laser diode package versions. Butterfly versions are available for 7-pin, 13-pin, 14-pin, 20-pin and 26-pin packages. This series of mounts accommodates most telecom laser module types including CW, directly modulated (Bias-T), 2.5 Gbits/s, 10 Gbits/s, and tunable DFB laser modules. Each mount features ILX Lightwave’s standard 9-pin D-sub input connectors for laser current and temperature control with configurable pin designations to accommodate virtually any laser diode pin configuration. Zero insertion force (ZIF) sockets and spring-loaded clamps facilitate easy of mounting. Bias-T options include a 50

SMA input connector and circuitry for directly modulating the laser drive current.
A laser case temperature control option is available for all the laser diode mounts and comes standard on the LDM-4982M and LDM-4986. Case temperature control is ideal for applications requiring tight temperature stability, different case temperatures, or for testing laser diodes at a wider temperature range than can be accomplished with the internal TEC of the laser diode.
The LDM-4980 Series offers a high-value laser diode fixturing solution, and are
ideal for use with ILX Lightwave laser diode control instrumentation.
Model Number
Package Type
Bias-T Option
Modulation Bandwidth
RF Input Impedance
Hot Plate Connection
LDM-4982
DIL
Call ILX for details
10 MHz - 800 MHz
1
50

1
Floating
LDM-4982M
5
Mini-DIL
--
--
--
Floating
LDM-4983
13-pin RF Butterfly
2
7-pin RF Butterfly
3
--
See Note 2
--
User Configurable
LDM-4984
14-pin Butterfly
LDM-4984-BTB LDM-4984T-BTB
10 MHz - 800 MHz
1
50

1
Floating
LDM-4984RF
4
14-pin Internal Bias-T Modulated
--
10 MHz - 2.5 GHz
50

25

Floating
LDM-4986
5
Connectorized
--
--
--
Floating
LDM-4989
26-pin Butterfly
20-pin Butterfly
--
--
--
User Configurable
2

LDM-4980 Series
Table 1.1
ILX Lightwave Mount Types and Packages
Modulation bandwidth with Bias-T option.
Typically 10Gbit/s laser application. All pins are on one side of laser package and coaxial RF connector is
on other side of laser package.
LDM-4983 13-pin RF mount can be used with 7-pin butterfly laser package by using every other pin of the 13-pin ZIF socket and
wiring the mount accordingly.
Typically 2.5GHz laser application. Mount connects RF launch block to pin-12 for internal Bias-T. LDM-4984RF mount designed for
lasers with 25 input impedance to internal Bias-T modulation. The RF input on the mount is a 50

SMA connector.
Case temperature control is standard on the LDM-4982M and LDM-4986 mount.
The LDM-4980 mounts allow direct interfacing to all of ILX Lightwave's current sources and temperature controllers through standard ILX cables (except LDM- 4989). This feature gives you the flexibility to select the proper current source or temperature controller for your particular application.
Within the laser mount, screw-lead configuration headers allow you to configure the wiring of the mount to accept variations of laser package pin-outs. The LDM-4982 and LDM-4984 mounts are available with a Bias-T option to facilitate high-speed laser current modulation. The Bias-T option accepts a 50

impedance-matched modulation input through a standard SMA RF connector.
Wiring is provided for controlling the laser's internal thermoelectric modules. In addition, the case temperature control option is available. This option allows for simultaneous and independent control of both laser die temperature and package temperature for controlled-environment testing or where extreme temperature stability is required.
The LDM-4980 consists of a housing, laser heat sink/PCB assembly, and a bottom cover. The housing includes a grounding receptacle for a wrist strap, as well as a grounded laser cover to improve thermal stability and help shield the laser from radiated noise and transients.
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