---
product_id: 107418086
title: "Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm"
brand: "orientek"
price: "651 Lei"
currency: RON
in_stock: true
reviews_count: 7
category: "Orientek"
url: https://www.desertcart.ro/products/107418086-orientek-tls-25m-mini-optical-light-source-sm-1310-1550nm
store_origin: RO
region: Romania
---

# Dual wavelength 1310/1550nm Output power -5dBm for reliable signal Universal SC 2.5mm connector (LC optional) Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm

**Brand:** orientek
**Price:** 651 Lei
**Availability:** ✅ In Stock

## Summary

> 🔦 Light up your fiber testing game with precision and power!

## Quick Answers

- **What is this?** Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm by orientek
- **How much does it cost?** 651 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/107418086-orientek-tls-25m-mini-optical-light-source-sm-1310-1550nm)

## Best For

- orientek enthusiasts

## Why This Product

- Trusted orientek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Integration:** Pairs perfectly with popular tools like the Orientek TFI-40 wand for enhanced testing efficiency.
- • **Universal Connectivity:** Equipped with SC 2.5mm connector and optional LC 1.25mm for broad compatibility.
- • **Compact & Durable Design:** Lightweight and rugged, built to keep up with your fast-paced fieldwork.
- • **Consistent Signal Output:** Delivers a stable -5dBm output power ensuring accurate diagnostics every time.
- • **Precision Dual-Wavelength Performance:** Seamlessly switch between 1310nm and 1550nm for versatile fiber testing.

## Overview

The Orientek T15M Optical Light Source is a compact, battery-powered device designed for fiber optic testing, offering dual wavelengths at 1310nm and 1550nm with a reliable -5dBm output. Featuring a universal SC connector with an optional LC adapter, it ensures broad compatibility and pairs seamlessly with other fiber optic tools, making it an essential, budget-friendly choice for professionals seeking accurate and efficient field diagnostics.

## Description

Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm | Mini Fiber Optic Stable Light Source; Mini Handheld Optical Light Source; 2.5mm Universal Connector; Fiber Tester: desertcart.com: Industrial & Scientific

Review: Best budget light source, pairs well with TFI-40 wand. - Are you a technician for a certain telephone and telegraph company in America? Are you tired of begging your supervisor for test overrides, or driving all the way to the PFP to get a passing test? Boy, do I have a solution for you! Joking aside (I do not condone falsifying company documents 👀), this device does what it’s supposed to do very well for the price. I got it primarily to generate 2khz tone on a fiber, which I detect with the Orientek TFI-40 wand. Furthest I’ve tested it is 6,000ft, and it works great. If you want something that generates light for legitimate purposes 👀 or something that generates 2khz tone for situations where you can’t use a laser for fiber identification, this is your best bet.
Review: Great value - Smooth functionality, accurate, great value, very easy to use, durable

## Features

- Multi‑wavelength Output Options: Supports PON 1310/1490/1550nm, Single‑Mode 1310/1550nm, Multi‑Mode 850/1300nm; typical output power ≥‑5dBm, CW /270Hz/1KHz/2KHz modulation frequencies for fiber‑link insertion‑loss measurement.
- Pocket‑sized Rugged Field‑tool Design: Compact handheld mini size; 2‑meter drop‑resistance protection, detachable silicone protective sleeve, water‑resistant keys; suitable for complex outdoor construction environments.
- Backlit LCD display plus built‑in LED for dark‑site operation; low‑battery reminder and auto‑power‑off function; plug‑and‑play, one‑key wavelength switching for fast field testing.
- Wide Compatibility of Optical Connector: SC+ 2.5mm universal (1.25mm for LC is Optional); meets most FTTx, telecom, CATV fiber‑test requirements
- Long Standby Powered by AAA Battery: Powered by 2×AAA alkaline batteries (batteries not included in package need you buy); widely applied in FTTx deployment, fiber‑cable maintenance, network acceptance test, cooperating with optical power meter to complete link loss testing.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07LBMV72B |
| Best Sellers Rank | #1,032,146 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,594 in Multi Testers |
| Brand | ORIENTEK |
| Brand Name | ORIENTEK |
| Color | blue and black |
| Compatible Devices | Fiber optic cables, connectors, OTDRs, fiber optic splicers, other testing devices in the field of fiber optics |
| Customer Reviews | 3.8 out of 5 stars 20 Reviews |
| Item Highlight | Mini Fiber Optic Stable Light Source; Mini Handheld Optical Light Source; 2.5mm Universal Connector; Fiber Tester |
| Item Weight | 0.27 g |
| Manufacturer | Nanjing Orientek Optical Communication Limited |
| Measurement Type | Optical Power Meter |
| Model | TPM-25 |
| Number of Items | 1 |
| Part Number | TPM-25 |
| Power Source | Battery Powered |
| Style | T15M Light Source |
| Style Name | T15M Light Source |
| Unit Count | 1 Count |

## Product Details

- **Brand:** ORIENTEK
- **Color:** blue and black
- **Item Weight:** 0.27 g
- **Power Source:** Battery Powered
- **Style:** T15M Light Source

## Images

![Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm - Image 1](https://m.media-amazon.com/images/I/51ihY-ylGvL.jpg)
![Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm - Image 2](https://m.media-amazon.com/images/I/611zabTMPZL.jpg)
![Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm - Image 3](https://m.media-amazon.com/images/I/61yqhOW6VmL.jpg)
![Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm - Image 4](https://m.media-amazon.com/images/I/613wDTeMpwL.jpg)
![Orientek TLS-25M Mini Optical Light Source SM 1310/1550nm - Image 5](https://m.media-amazon.com/images/I/51aUNJLaeZL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best budget light source, pairs well with TFI-40 wand.
*by Y***N on November 3, 2024*

Are you a technician for a certain telephone and telegraph company in America? Are you tired of begging your supervisor for test overrides, or driving all the way to the PFP to get a passing test? Boy, do I have a solution for you! Joking aside (I do not condone falsifying company documents 👀), this device does what it’s supposed to do very well for the price. I got it primarily to generate 2khz tone on a fiber, which I detect with the Orientek TFI-40 wand. Furthest I’ve tested it is 6,000ft, and it works great. If you want something that generates light for legitimate purposes 👀 or something that generates 2khz tone for situations where you can’t use a laser for fiber identification, this is your best bet.

### ⭐⭐⭐⭐⭐ Great value
*by G***R on April 15, 2026*

Smooth functionality, accurate, great value, very easy to use, durable

### ⭐⭐⭐ T15M + T25M Kinda Works.. and ARE Inexpensive... But...
*by P***R on February 23, 2024*

Somebody had to be among the first people to buy this Optical Light Source (OLS) and his companion the Orientek T25M Optical Power Meter (OPM). For the money, I figured I'd give the pair a try. I don't have other optical test equipment to test these against, so this review is really for the pair of these devices. Let me start by saying that I grabbed some random LC/UPC to "2.5mm universal Interface" converters from here on Amazon, and I used those for all my testing. They didn't properly "lock" on to either unit (the OPM has threads for an adapter, the OLS does not). The one-page OLS spec (on the Orientek web site) says the generated power is -5dbm. I plugged a 3m single mode fiber LC to LC fiber into the adapters, turned on the OPM and OLS, set them both to 1550nm, and... behold... a reading that varied from between -4.something to -5.something -- I say ".something" because the value I got bounced around quite a bit. If I unplug the fiber from one end, the reading on the OPM say "LO" -- So, SORT of good... though how we could get -4dbm from a light source that's rated at -5dbm is certainly a good question. But, let's just go with it. Here's where it gets more fun: I changed the OLS from 1550nm to 1310nm. But I left the OPM on 1550nm. I got only a slightly different power reading on the OPM (-5.something dbm). Hmmmm.... Then I switched the OPM to 1625nm. I still got a very similar power reading (again, about -5.something dbm). So, we know that either the OPM isn't very selective or the OLS isn't very specific. I added a modulated signal at the OLS, and the OPM detected the proper modulation each time and indicated a different (sometimes lower, sometimes higher) power level than with no modulation applied. I measured other lengths of SM optical fiber (up to 30m... I don't have anything longer to try) and got pretty much the same readings, which is as it should be given that the insertion loss for the 30m fiber cable I have is spec'ed at <= 0.15dbm (if you can believe the package, but that's a whole other story). Finally, I measured a pair of fibers coupled together with and LC/UPC F to LC/UPC F fiber coupler. I didn't see any insertion loss, which (again) is reasonable given that the couplers are spec'ed at 0.2dB IL. In summary, what can I say about these devices? Well, they're obviously not precision instruments. I'd say they're good enough to detect massive issues (like, "Did I break that fiber or the connector on it?")... They're good enough to allow you to identify individual fibers if you have a bundle. They're good enough for home use (which is why I bought them). I'm going to keep them, but there are lots of little, niggling, issues that result in my not being thrilled with my purchase.

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-10-06*