100G QSFP28光トランシーバー（SR4、LR4、CWDM4など）を選択するための完全ガイド

When you pick a 100G QSFP28トランシーバー, think about what your network needs. Check important things like compatibility, how far data must travel, fiber type, connector type, where you will use it, and if it will work in the future. Choosing QSFP28 optical transceivers that fit your system helps your network work well and keeps your money safe. This definitive guide cuts through the confusion, exploring all major 100G QSFP28 options – from SR4 および LR4 、 CWDM4, シングルラムダ, and beyond – helping you make an informed decision for your 高速接続 要件によって異なります。.

📝 What is a QSFP28 Optical Module?

この QSFP28（クアッド・スモール・フォームファクタ・プラガブル28） is the industry-standard form factor for 100 Gigabit Ethernet (100GbE) and high-speed data center interconnects. It packs four lanes operating at 25Gbps or a single high-speed lane into a compact, hot-pluggable module.

📝 Demystifying Your 100G QSFP28 Options: A Technical Breakdown

100G-SR4 (Short Range)
- 技術： Parallel multimode fiber (MMF) using 4 lanes (4x25G NRZ).
- 到達距離： Up to 70m (OM3 MMF), 100m (OM4 MMF), or 150m (OM5 MMF).
- ファイバータイプ： 必要とする MTP／MPO-12
  connector. Uses 4 fibers for Tx and 4 fibers for Rx (8 fibers total).
- 最適な用途： Top-of-rack switching, データセンター内リンク, server-to-leaf connectivity within racks or rows using multimode fiber cabling. Cost-effective for short distances.
- Model Example: QSFP28-100G-SR4 LINK-PP LQ-M85100-SR4C (Supports OM3/OM4/OM5)
100G-PSM4 (Parallel Single Mode 4 Lane)
- 技術： Parallel single-mode fiber （SMF） using 4 lanes (4x25G NRZ).
- 到達距離： Typically up to 500m over standard SMF.
- ファイバータイプ： 必要とする MTP／MPO-12
  connector. Uses 4 fibers for Tx and 4 fibers for Rx (8 fibers total).
- 最適な用途： Longer intra-data center or campus links than SR4 allows, where SMF infrastructure is already deployed or preferred for future-proofing. Less common than CWDM4/LR4 for longer SMF reaches.
100G-LR4 / ER4 / ZR4 (Long/Extended/Extended+ Range)
- 技術： Coarse Wavelength Division Multiplexing （CWDM）
  over duplex SMF. Combines 4 wavelengths (around 1295, 1300, 1304, 1309nm) onto 2 fibers (1 Tx, 1 Rx). LR4 is standard, ER4 offers extended reach, ZR4 offers longest reach.
- 到達距離：
  - LR4: 最大10km
  - ER4: 最大40km
  - ZR4: Up to 80km+
- ファイバータイプ： Uses standard デュプレックスLC
  connectors. Requires only 2 fibers.
- 最適な用途： データセンター間接続（DCI）, メトロネットワーク, building-to-building links, aggregation layers. Essential for 長距離光ファイバー伝送. ER4/ZR4 are for specialized, longer-haul applications.
- Model Example: LINK-PP QSFP28-100G-LR4 LQ-LW100-LR4C (10km), LINK-PP QSFP28-100G-ER4 LQ-LW100-ER4C (40km), LINK-PP QSFP28-100G-ZR4 LQ-LW100-ZR4C (80km)
100G-CWDM4
- 技術： Similar to LR4, uses CWDM over duplex SMF but with slightly different wavelengths (1271, 1291, 1311, 1331nm) optimized for lower cost and power consumption.
- 到達距離： Up to 2km. Defined by the CWDM4 MSA.
- ファイバータイプ： Uses standard デュプレックスLC
  connectors. Requires only 2 fibers.
- 最適な用途： Cost-effective solution for intra-data center SMF links up to 2km (e.g., between buildings on a campus, across larger data halls). A popular alternative to PSM4 for duplex SMF.
- Model Example: LINK-PP QSFP-100G-CWDM4 LQ-CW100-FR4C
  (2km)
100G Single Lambda (e.g., FR1/LR1/ER1/DR1/ZR1)
- 技術： （垂直共振器表面放出レーザー）レーザーを採用します。VCSELはコスト効率が良く、 お客様の high-speed wavelength (e.g., 53.125 Gbaud PAM4変調) over duplex SMF. Includes various reaches:
  - FR1 (2km) / LR1 (10km): Common standards.
  - DR1 (500m): Often uses 1310nm wavelength.
  - ER1 (40km) / ZR1 (80km+): Longer reach variants.
- 到達距離： Varies (500m, 2km, 10km, 40km, 80km+).
- ファイバータイプ： Uses standard デュプレックスLC
  connectors. Requires only 2 fibers.
- 最適な用途： Next-generation data center architectures, simplifying fiber plant (only 2 fibers needed per link), preparing for 400G/800G (which rely heavily on PAM4). Offers 高いポート密度 potential. Key for future-proof network design.
- Model Example: LINK-PP QSFP-100G-DR1 LQ-SM31100-DR1C
  (10km).
100G-SWDM4 (Short Wavelength Division Multiplexing)
- 技術： Uses wavelength division multiplexing over MMF. Combines 4 VCSEL-based wavelengths (850, 880, 910, 940nm) onto 2 fibers (1 Tx, 1 Rx).
- 到達距離： Up to 75m (OM3), 100m (OM4), 150m (OM5).
- ファイバータイプ： Uses standard デュプレックスLC
  connectors. Requires only 2 fibers.
- 最適な用途： Leveraging existing LC duplex MMF cabling for 100G, avoiding the need for MTP/MPO upgrades. Ideal for fiber migration strategies where duplex MMF is prevalent.
- Model Example: LINK-PP QSFP-100G-SWDM4 LQ-SW100-SR4C (100m)
100G Bidirectional (BiDi)
- 技術： （垂直共振器表面放出レーザー）レーザーを採用します。VCSELはコスト効率が良く、 お客様の strand of fiber. Achieves full duplex 100G by transmitting and receiving on two different wavelengths (e.g., Tx 1330nm / Rx 1270nm) over the same fiber.
- 到達距離： Typically up to 10km or 20km over SMF.
- ファイバータイプ： （垂直共振器表面放出レーザー）レーザーを採用します。VCSELはコスト効率が良く、 single simplex LC connector. Requires only 1 fiber strand per link.
- 最適な用途： Maximizing existing fiber infrastructure (doubling capacity), fiber exhaust scenarios, cost-effective upgrades where fiber is scarce. Crucial for 光ファイバー容量の最適化に不可欠です。.
100G/112G Dual-Rate Modules
- 技術： Hermetic TOSA with LAN-WDM based DFB 25.78G/s and 27.95G/s data rate support.
- 到達距離： Typically up to 10km over SMF
- ファイバータイプ： Uses standard デュプレックスLC
  connectors. Requires only 2 fibers.
- 最適な用途： 100GBASE-LR4 Ethernet Links, Infiniband QDR and DDR interconnects, Client-side 100G Telecom connections.
- Model Example: LINK-PP LQ-LW112-LR4C.

100G QSFP28 Transceiver Comparison at a Glance

モジュールタイプ	技術	波長	光ファイバの種類およびコネクタ	最大伝送距離	主な用途
100G-SR4	4x25G NRZ (MMF)	850nm	MMF / MPO-12	70m-150m	Short Intra-DC, ToR Switching
100G-PSM4	4x25G NRZ (SMF)	1310nm	SMF / MPO-12	500m	Medium Intra-DC/Campus (Parallel)
100G-LR4	4x25G LWDM	~1295-1310nm	SMF / LC Duplex	10km	DCI, Metro, Building Links
100G-ER4/ZR4	4x25G LWDM	~1295-1310nm	SMF / LC Duplex	40km / 80km+	Long-Haul DCI, Metro
100G-CWDM4	4x25G CWDM	1271-1331nm	SMF / LC Duplex	2km	Cost-Effective Intra-DC SMF
100G Single Lambda	1x100G PAM4	1310nm (e.g.)	SMF / LC Duplex	500m-80km+	Next-Gen DC, Simplified Fiber
100G-SWDM4	4x25G WDM (MMF)	850-940nm	MMF / LC Duplex	75m-150m	Leverage Duplex MMF Cabling
100G BiDi	1x100G BiDi	e.g., Tx1330/Rx1270	SMF / Simplex LC	10km/20km/40km	Fiber Exhaust, Single Strand
Dual-Rate (e.g., LR4)	100G / 112G	LAN-WDM, 1295-1309nm	SMF / Duplex LC	Depends on Mode	Migration, Aggregation Flexibility

📝 Choosing the Right LINK-PP QSFP28 Module: Key Considerations

必要な距離： This is the primary driver (SR4 for <150m MMF, CWDM4 for 2km SMF, LR4 for 10km, etc.).
Fiber Infrastructure: What’s already installed (MMF vs SMF, MPO vs LC duplex/simplex)? SWDM4 uses duplex MMF, BiDi uses simplex SMF.
コスト： SR4 & CWDM4 are generally lower cost than LR4/ER4 or Single Lambda. BiDi can save fiber costs.
消費電力： CWDM4 and newer PAM4 modules (Single Lambda) often have lower power than LR4.
将来への対応力（Future-Proofing）： Single Lambda modules align with 400G/800G technologies using PAM4.
Dual Rate Needs: Do you require 4x25G or 4x28G connectivity now or in the future?
Fiber Capacity: Is fiber scarce? BiDi modules effectively double your fiber capacity.

📝 Optimize Your 100G Network with Confidence

最適な 100G QSFP28トランシーバー is fundamental for achieving high-performance networking, scalable data center architecture, および maximizing ROI on your 光ファイバーインフラにおける基本的な区別です。. By understanding the strengths of each technology – from the cost-effective 100G-SR4 for racks to the long-haul capabilities of 100G-LR4/ER4, the fiber-saving magic of 100G-BiDi, or the future-ready 100G Single Lambda (PAM4) modules – you can make strategic decisions that align with your specific network design requirements.

Ready to Deploy High-Performance 100G Connectivity?

LINK-PP offers a comprehensive portfolio of reliable, MSA準拠の 100G QSFP28 optical modules, including all the types discussed: SR4, LR4, ER4, CWDM4, Single Lambda (DR1/FR1), SWDM4, BiDi
, および デュアルレート solutions. Our transceivers are rigorously tested for これらのいずれかが失敗すると、リンクがダウンしたままになるか不安定になる可能性があります。 and performance, ensuring seamless integration into your シスコ, アリスト, ジュニパー, Mellanox, 、または Huawei switches and routers.