diff --git a/drivers/optical/src/main/java/org/onosproject/driver/optical/extensions/OplinkExtensionTreatmentCodec.java b/drivers/optical/src/main/java/org/onosproject/driver/optical/extensions/OplinkExtensionTreatmentCodec.java
new file mode 100644
index 0000000..fbe6edf
--- /dev/null
+++ b/drivers/optical/src/main/java/org/onosproject/driver/optical/extensions/OplinkExtensionTreatmentCodec.java
@@ -0,0 +1,51 @@
+package org.onosproject.driver.optical.extensions;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onlab.osgi.DefaultServiceDirectory;
+import org.onlab.osgi.ServiceDirectory;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.CodecService;
+import org.onosproject.codec.ExtensionTreatmentCodec;
+import org.onosproject.driver.extensions.OplinkAttenuation;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
+import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
+
+import static org.onlab.util.Tools.nullIsIllegal;
+
+/**
+ * Codec for Oplink extensions.
+ */
+public class OplinkExtensionTreatmentCodec extends AbstractHandlerBehaviour
+        implements ExtensionTreatmentCodec {
+
+    private static final String TYPE = "type";
+    private static final String MISSING_TYPE = "Missing extension type";
+    private static final String UNSUPPORTED_TYPE = "Extension type is not supported: ";
+
+    @Override
+    public ExtensionTreatment decode(ObjectNode objectNode, CodecContext context) {
+        if (objectNode == null || !objectNode.isObject()) {
+            return null;
+        }
+
+        int typeInt = nullIsIllegal(objectNode.get(TYPE), MISSING_TYPE).asInt();
+        ExtensionTreatmentType type = new ExtensionTreatmentType(typeInt);
+
+        if (type.equals(ExtensionTreatmentType.ExtensionTreatmentTypes.OPLINK_ATTENUATION.type())) {
+            return decodeTreatment(objectNode, context, OplinkAttenuation.class);
+        } else {
+            throw new UnsupportedOperationException(UNSUPPORTED_TYPE + type.toString());
+        }
+    }
+
+    private <T extends ExtensionTreatment> ExtensionTreatment decodeTreatment(
+            ObjectNode objectNode, CodecContext context, Class<T> entityClass) {
+        if (context == null) {
+            ServiceDirectory serviceDirectory = new DefaultServiceDirectory();
+            return serviceDirectory.get(CodecService.class).getCodec(entityClass).decode(objectNode, null);
+        } else {
+            return context.codec(entityClass).decode(objectNode, context);
+        }
+    }
+}